[tracker] Plug leaks in GStreamer extractor on pipeline creation errors.

[Carlos Garnacho <carlosg src gnome org>]

commit 74edde183f173b01ee900b469b75d6e1da102bdb
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue Jun 29 16:13:09 2010 +0200

    Plug leaks in GStreamer extractor on pipeline creation errors.

 src/tracker-extract/tracker-extract-gstreamer.c |   22 ++++++++++++----------
 1 files changed, 12 insertions(+), 10 deletions(-)
---
diff --git a/src/tracker-extract/tracker-extract-gstreamer.c b/src/tracker-extract/tracker-extract-gstreamer.c
index 53f490c..c5d86fa 100644
--- a/src/tracker-extract/tracker-extract-gstreamer.c
+++ b/src/tracker-extract/tracker-extract-gstreamer.c
@@ -1105,37 +1105,39 @@ create_decodebin_pipeline (MetadataExtractor *extractor, const gchar *uri)
 	GstElement *filesrc  = NULL;
 	GstElement *bin      = NULL;
 
-	guint       id;
-
 	pipeline = gst_element_factory_make ("pipeline", NULL);
 	if (!pipeline) {
 		g_warning ("Failed to create GStreamer pipeline");
-		return FALSE;
+		return NULL;
 	}
 
 	filesrc = gst_element_factory_make ("giosrc", NULL);
 	if (!filesrc) {
 		g_warning ("Failed to create GStreamer giosrc");
-		return FALSE;
+		gst_object_unref (GST_OBJECT (pipeline));
+		return NULL;
 	}
 
 	bin = gst_element_factory_make ("decodebin2", "decodebin2");
 	if (!bin) {
 		g_warning ("Failed to create GStreamer decodebin");
-		return FALSE;
+		gst_object_unref (GST_OBJECT (pipeline));
+		gst_object_unref (GST_OBJECT (filesrc));
+		return NULL;
 	}
 
-	id = g_signal_connect (G_OBJECT (bin),
-	                       "new-decoded-pad",
-	                       G_CALLBACK (dbin_dpad_cb),
-	                       extractor);
+	g_signal_connect (G_OBJECT (bin),
+			  "new-decoded-pad",
+			  G_CALLBACK (dbin_dpad_cb),
+			  extractor);
 
 	gst_bin_add (GST_BIN (pipeline), filesrc);
 	gst_bin_add (GST_BIN (pipeline), bin);
 
 	if (!gst_element_link_many (filesrc, bin, NULL)) {
 		g_warning ("Could not link GStreamer elements");
-		return FALSE;
+		gst_object_unref (GST_OBJECT (pipeline));
+		return NULL;
 	}
 
 	g_object_set (G_OBJECT (filesrc), "location", uri, NULL);