[evolution-data-server] Avoid a crash in gdata_goa_authorizer_get_parameters().

[Matthew Barnes <mbarnes src gnome org>]

commit 516ad151d392777f21b4ebf87fe836807013fc9b
Author: Matthew Barnes <mbarnes redhat com>
Date:   Tue Aug 23 10:54:45 2011 -0400

    Avoid a crash in gdata_goa_authorizer_get_parameters().
    
    I had assumed the SoupURI always has a query part, which is wrong,
    and soup_form_decode() chokes on NULL strings.

 .../backends/google/e-gdata-goa-authorizer.c       |   21 ++++++++++++-------
 1 files changed, 13 insertions(+), 8 deletions(-)
---
diff --git a/addressbook/backends/google/e-gdata-goa-authorizer.c b/addressbook/backends/google/e-gdata-goa-authorizer.c
index 6b568d8..a7dcdf1 100644
--- a/addressbook/backends/google/e-gdata-goa-authorizer.c
+++ b/addressbook/backends/google/e-gdata-goa-authorizer.c
@@ -67,13 +67,12 @@ gdata_goa_authorizer_get_parameters (SoupMessage *message,
 	GString *base_string;
 	GString *signing_key;
 	GHashTable *parameters;
-	GHashTable *hash_table;
 	GHashTableIter iter;
 	SoupURI *soup_uri;
 	GList *keys, *link;
 	gchar *string;
 	gchar *request_uri;
-	gpointer key, value;
+	gpointer key;
 
 	parameters = g_hash_table_new_full (
 		(GHashFunc) g_str_hash,
@@ -87,13 +86,19 @@ gdata_goa_authorizer_get_parameters (SoupMessage *message,
 	 * table directly. */
 
 	soup_uri = soup_message_get_uri (message);
-	hash_table = soup_form_decode (soup_uri->query);
-	g_hash_table_iter_init (&iter, hash_table);
-	while (g_hash_table_iter_next (&iter, &key, &value)) {
-		key = (gpointer) g_intern_string (key);
-		g_hash_table_insert (parameters, key, g_strdup (value));
+	if (soup_uri->query != NULL) {
+		GHashTable *hash_table;
+		gpointer value;
+
+		hash_table = soup_form_decode (soup_uri->query);
+		g_hash_table_iter_init (&iter, hash_table);
+		while (g_hash_table_iter_next (&iter, &key, &value)) {
+			key = (gpointer) g_intern_string (key);
+			value = g_strdup (value);
+			g_hash_table_insert (parameters, key, value);
+		}
+		g_hash_table_destroy (hash_table);
 	}
-	g_hash_table_destroy (hash_table);
 
 	/* Add OAuth parameters. */