[tracker/writeback: 14/16] TrackerWritebackDispatcher: add sanity check on returned metadata.

[Philip Van Hoof <pvanhoof src gnome org>]

commit b5d3d3001735bf0a183e485b322d8cdceb523f0c
Author: Carlos Garnacho <carlos lanedo com>
Date:   Wed Nov 18 11:56:50 2009 +0100

    TrackerWritebackDispatcher: add sanity check on returned metadata.

 .../tracker-writeback-dispatcher.c                 |   27 +++++++++++---------
 1 files changed, 15 insertions(+), 12 deletions(-)
---
diff --git a/src/tracker-writeback/tracker-writeback-dispatcher.c b/src/tracker-writeback/tracker-writeback-dispatcher.c
index b7782d3..165c01a 100644
--- a/src/tracker-writeback/tracker-writeback-dispatcher.c
+++ b/src/tracker-writeback/tracker-writeback-dispatcher.c
@@ -286,24 +286,27 @@ on_sparql_result_received (GPtrArray *result,
 	gchar **rdf_types;
 
 	data = user_data;
-	rdf_types = data->rdf_types;
-	priv = TRACKER_WRITEBACK_DISPATCHER_GET_PRIVATE (data->dispatcher);
 
-	g_hash_table_iter_init (&iter, priv->modules);
+	if (result && result->len > 0) {
+		rdf_types = data->rdf_types;
+		priv = TRACKER_WRITEBACK_DISPATCHER_GET_PRIVATE (data->dispatcher);
 
-	while (g_hash_table_iter_next (&iter, &key, &value)) {
-		module = value;
+		g_hash_table_iter_init (&iter, priv->modules);
 
-		module_types = tracker_writeback_module_get_rdftypes (module);
+		while (g_hash_table_iter_next (&iter, &key, &value)) {
+			module = value;
 
-		if (types_match (module_types, rdf_types)) {
-			TrackerWriteback *writeback;
+			module_types = tracker_writeback_module_get_rdftypes (module);
 
-			writeback = tracker_writeback_module_create (module);
-			tracker_writeback_update_metadata (writeback, result);
-			g_object_unref (writeback);
-		}
+			if (types_match (module_types, rdf_types)) {
+				TrackerWriteback *writeback;
 
+				writeback = tracker_writeback_module_create (module);
+				tracker_writeback_update_metadata (writeback, result);
+				g_object_unref (writeback);
+			}
+
+		}
 	}
 
 	g_strfreev (data->rdf_types);