[evolution] Fix various memory leaks

[Milan Crha <mcrha src gnome org>]

commit f34d0c637d2fc51ad938acb09ae48de3810c1441
Author: Milan Crha <mcrha redhat com>
Date:   Thu Apr 23 17:50:23 2015 +0200

    Fix various memory leaks

 em-format/e-mail-formatter-quote.c  |    7 +++++++
 em-format/e-mail-formatter-utils.c  |    2 +-
 libemail-engine/mail-folder-cache.c |    1 +
 mail/e-mail-reader-utils.c          |    2 ++
 4 files changed, 11 insertions(+), 1 deletions(-)
---
diff --git a/em-format/e-mail-formatter-quote.c b/em-format/e-mail-formatter-quote.c
index 1916bba..99b31fe 100644
--- a/em-format/e-mail-formatter-quote.c
+++ b/em-format/e-mail-formatter-quote.c
@@ -148,6 +148,13 @@ e_mail_formatter_quote_init (EMailFormatterQuote *formatter)
 static void
 e_mail_formatter_quote_finalize (GObject *object)
 {
+       EMailFormatterQuote *formatter;
+
+       formatter = E_MAIL_FORMATTER_QUOTE (object);
+
+       g_free (formatter->priv->credits);
+       formatter->priv->credits = NULL;
+
        /* Chain up to parent's finalize() */
        G_OBJECT_CLASS (e_mail_formatter_quote_parent_class)->finalize (object);
 }
diff --git a/em-format/e-mail-formatter-utils.c b/em-format/e-mail-formatter-utils.c
index 0e0eac9..10252f7 100644
--- a/em-format/e-mail-formatter-utils.c
+++ b/em-format/e-mail-formatter-utils.c
@@ -431,7 +431,7 @@ e_mail_formatter_format_header (EMailFormatter *formatter,
                camel_header_newsgroups_free (ng);
 
                txt = html->str;
-               g_string_free (html, FALSE);
+               value = g_string_free (html, FALSE);
 
                flags |= E_MAIL_FORMATTER_HEADER_FLAG_HTML;
                flags |= E_MAIL_FORMATTER_HEADER_FLAG_BOLD;
diff --git a/libemail-engine/mail-folder-cache.c b/libemail-engine/mail-folder-cache.c
index 2244c04..07d6bac 100644
--- a/libemail-engine/mail-folder-cache.c
+++ b/libemail-engine/mail-folder-cache.c
@@ -909,6 +909,7 @@ folder_cache_check_ignore_thread (CamelFolder *folder,
                                           the rest is just a guess. */
                                        found_first_msgid = TRUE;
                                        first_ignore_thread = camel_message_info_user_flag (refrinfo, 
"ignore-thread");
+                                       camel_message_info_unref (refrinfo);
                                        break;
                                }
 
diff --git a/mail/e-mail-reader-utils.c b/mail/e-mail-reader-utils.c
index fcd2698..9c84ba3 100644
--- a/mail/e-mail-reader-utils.c
+++ b/mail/e-mail-reader-utils.c
@@ -874,6 +874,8 @@ mark_ignore_thread_traverse_uids (CamelFolder *folder,
 
                mi = camel_folder_get_message_info (folder, uid);
                if (!mi || !camel_message_info_message_id (mi)) {
+                       if (mi)
+                               camel_message_info_unref (mi);
                        camel_pstring_free (uid);
                        continue;
                }