[tracker] Critical warning fixes in gstreamer extractor

[Philip Van Hoof <pvanhoof src gnome org>]

commit eb1bfc7cda72afd401f96fa40737d2887ff01751
Author: Philip Van Hoof <philip codeminded be>
Date:   Wed Sep 9 11:08:27 2009 +0200

    Critical warning fixes in gstreamer extractor

 src/tracker-extract/tracker-extract-gstreamer.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/tracker-extract/tracker-extract-gstreamer.c b/src/tracker-extract/tracker-extract-gstreamer.c
index 436bb77..4ea8687 100644
--- a/src/tracker-extract/tracker-extract-gstreamer.c
+++ b/src/tracker-extract/tracker-extract-gstreamer.c
@@ -329,11 +329,11 @@ get_embedded_album_art(MetadataExtractor *extractor)
 				extractor->album_art_data = buffer->data;
 				extractor->album_art_size = buffer->size;
 				extractor->album_art_mime = gst_structure_get_name (caps_struct);
-				gst_object_unref (caps);
+				gst_caps_unref (caps);
 				return TRUE;
 			}
 
-			gst_object_unref (caps);
+			gst_caps_unref (caps);
 
 			lindex++;
 		}
@@ -519,7 +519,7 @@ extract_metadata (MetadataExtractor *extractor,
 
 			s = NULL;
 			gst_tag_list_get_string (extractor->tagcache, GST_TAG_GENRE, &s);
-			if (g_strcmp0 (s, "Unknown") != 0) {
+			if (s && strcmp (s, "Unknown") != 0) {
 				tracker_statement_list_insert (metadata, uri, NFO_PREFIX "genre", s);
 			}
 			g_free (s);