[evolution-data-server] Fix few Coverity scan issues

[Milan Crha <mcrha src gnome org>]

commit 782efdfa0b1b9ff1d6da0843057c30201736648a
Author: Milan Crha <mcrha redhat com>
Date:   Mon Mar 20 17:58:31 2017 +0100

    Fix few Coverity scan issues

 .../backends/ldap/e-book-backend-ldap.c            |    6 ++++-
 src/addressbook/libebook-contacts/e-book-query.c   |    1 +
 .../libedata-book/e-book-backend-sqlitedb.c        |    1 +
 .../libedata-book/e-book-backend-summary.c         |    1 +
 src/camel/camel-db.c                               |    4 +-
 src/libedataserverui/e-webdav-discover-widget.c    |    2 +-
 src/tools/addressbook-export/addressbook-export.c  |   22 ++++++++-----------
 7 files changed, 20 insertions(+), 17 deletions(-)
---
diff --git a/src/addressbook/backends/ldap/e-book-backend-ldap.c 
b/src/addressbook/backends/ldap/e-book-backend-ldap.c
index 0e28f64..d4b8232 100644
--- a/src/addressbook/backends/ldap/e-book-backend-ldap.c
+++ b/src/addressbook/backends/ldap/e-book-backend-ldap.c
@@ -3818,7 +3818,11 @@ e_book_backend_ldap_build_query (EBookBackendLDAP *bl,
        }
 
        e_sexp_input_text (sexp, query, strlen (query));
-       e_sexp_parse (sexp);
+       if (e_sexp_parse (sexp) == -1) {
+               g_warning ("%s: Error in parsing '%s': %s", G_STRFUNC, query, e_sexp_get_error (sexp));
+               g_object_unref (sexp);
+               return NULL;
+       }
 
        r = e_sexp_eval (sexp);
 
diff --git a/src/addressbook/libebook-contacts/e-book-query.c 
b/src/addressbook/libebook-contacts/e-book-query.c
index 214ac8e..d182f53 100644
--- a/src/addressbook/libebook-contacts/e-book-query.c
+++ b/src/addressbook/libebook-contacts/e-book-query.c
@@ -777,6 +777,7 @@ e_book_query_from_string (const gchar *query_string)
 
        if (e_sexp_parse (sexp) == -1) {
                g_warning ("%s: Error in parsing: %s", G_STRFUNC, e_sexp_get_error (sexp));
+               g_object_unref (sexp);
                return NULL;
        }
 
diff --git a/src/addressbook/libedata-book/e-book-backend-sqlitedb.c 
b/src/addressbook/libedata-book/e-book-backend-sqlitedb.c
index 6768fed..23cdb36 100644
--- a/src/addressbook/libedata-book/e-book-backend-sqlitedb.c
+++ b/src/addressbook/libedata-book/e-book-backend-sqlitedb.c
@@ -3318,6 +3318,7 @@ e_book_backend_sqlitedb_check_summary_query_locked (EBookBackendSqliteDB *ebsdb,
        if (esexp_error == -1) {
                if (invalid_query)
                        *invalid_query = TRUE;
+               g_object_unref (sexp);
 
                return FALSE;
        }
diff --git a/src/addressbook/libedata-book/e-book-backend-summary.c 
b/src/addressbook/libedata-book/e-book-backend-summary.c
index df69281..79e46c3 100644
--- a/src/addressbook/libedata-book/e-book-backend-summary.c
+++ b/src/addressbook/libedata-book/e-book-backend-summary.c
@@ -1271,6 +1271,7 @@ e_book_backend_summary_search (EBookBackendSummary *summary,
        esexp_error = e_sexp_parse (sexp);
 
        if (esexp_error == -1) {
+               g_object_unref (sexp);
                return NULL;
        }
 
diff --git a/src/camel/camel-db.c b/src/camel/camel-db.c
index 6f0ce33..999d5cb 100644
--- a/src/camel/camel-db.c
+++ b/src/camel/camel-db.c
@@ -2342,7 +2342,7 @@ cdb_delete_ids (CamelDB *cdb,
                 GError **error)
 {
        gchar *tmp;
-       gint ret = 0;
+       gint ret;
        gboolean first = TRUE;
        GString *str = g_string_new ("DELETE FROM ");
        const GList *iterator;
@@ -2373,7 +2373,7 @@ cdb_delete_ids (CamelDB *cdb,
 
        g_string_append (str, ")");
 
-       ret = ret == -1 ? ret : camel_db_add_to_transaction (cdb, str->str, error);
+       ret = camel_db_add_to_transaction (cdb, str->str, error);
 
        if (ret == -1)
                camel_db_abort_transaction (cdb, NULL);
diff --git a/src/libedataserverui/e-webdav-discover-widget.c b/src/libedataserverui/e-webdav-discover-widget.c
index 944a583..c637540 100644
--- a/src/libedataserverui/e-webdav-discover-widget.c
+++ b/src/libedataserverui/e-webdav-discover-widget.c
@@ -644,7 +644,7 @@ e_webdav_discover_content_trust_prompt_done_cb (GObject *source_object,
                        e_webdav_discover_content_refresh_done_cb, rd);
        } else {
                g_cancellable_cancel (rd->cancellable);
-               g_cancellable_set_error_if_cancelled (rd->cancellable, &local_error);
+               g_warn_if_fail (g_cancellable_set_error_if_cancelled (rd->cancellable, &local_error));
                g_simple_async_result_take_error (rd->simple, local_error);
                local_error = NULL;
                g_simple_async_result_complete (rd->simple);
diff --git a/src/tools/addressbook-export/addressbook-export.c 
b/src/tools/addressbook-export/addressbook-export.c
index 65c6ab4..11c2c6c 100644
--- a/src/tools/addressbook-export/addressbook-export.c
+++ b/src/tools/addressbook-export/addressbook-export.c
@@ -78,7 +78,7 @@ action_list_folders_init (ActionContext *p_actctx)
                EBookClient *book_client;
                EBookQuery *query;
                ESource *source;
-               GSList *contacts;
+               GSList *contacts = NULL;
                const gchar *display_name;
                const gchar *uid;
                gchar *query_str;
@@ -108,8 +108,8 @@ action_list_folders_init (ActionContext *p_actctx)
                query_str = e_book_query_to_string (query);
                e_book_query_unref (query);
 
-               e_book_client_get_contacts_sync (
-                       book_client, query_str, &contacts, NULL, NULL);
+               if (!e_book_client_get_contacts_sync (book_client, query_str, &contacts, NULL, NULL))
+                       contacts = NULL;
 
                display_name = e_source_get_display_name (source);
                uid = e_source_get_uid (source);
@@ -123,9 +123,7 @@ action_list_folders_init (ActionContext *p_actctx)
                                "\"%s\",\"%s\",%d\n",
                                uid, display_name, g_slist_length (contacts));
 
-               g_slist_foreach (contacts, (GFunc) g_object_unref, NULL);
-               g_slist_free (contacts);
-
+               g_slist_free_full (contacts, g_object_unref);
                g_object_unref (book_client);
        }
 
@@ -804,7 +802,7 @@ action_list_cards_init (ActionContext *p_actctx)
        EBookClient *book_client;
        EBookQuery *query;
        ESource *source;
-       GSList *contacts;
+       GSList *contacts = NULL;
        const gchar *uid;
        gchar *query_str;
        GError *error = NULL;
@@ -851,13 +849,11 @@ action_list_cards_init (ActionContext *p_actctx)
        query_str = e_book_query_to_string (query);
        e_book_query_unref (query);
 
-       e_book_client_get_contacts_sync (
-               book_client, query_str, &contacts, NULL, &error);
-
-       action_list_cards (contacts, p_actctx);
+       if (e_book_client_get_contacts_sync (book_client, query_str, &contacts, NULL, &error)) {
+               action_list_cards (contacts, p_actctx);
+               g_slist_free_full (contacts, g_object_unref);
+       }
 
-       g_slist_foreach (contacts, (GFunc) g_object_unref, NULL);
-       g_slist_free (contacts);
        g_object_unref (book_client);
 
        if (error != NULL) {