[tracker] Fix "Non-void function should return a value"

[Ting-Wei Lan <lantw src gnome org>]

commit 064bb7eff921db5512c03b4ecaf967d6a0775579
Author: Ting-Wei Lan <lantw src gnome org>
Date:   Wed Jul 30 11:27:16 2014 +0800

    Fix "Non-void function should return a value"
    
    https://bugzilla.gnome.org/show_bug.cgi?id=733948

 src/libtracker-extract/tracker-extract-info.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/libtracker-extract/tracker-extract-info.c b/src/libtracker-extract/tracker-extract-info.c
index 63d77c6..c68c65a 100644
--- a/src/libtracker-extract/tracker-extract-info.c
+++ b/src/libtracker-extract/tracker-extract-info.c
@@ -322,7 +322,7 @@ tracker_extract_info_set_where_clause (TrackerExtractInfo *info,
 MediaArtProcess *
 tracker_extract_info_get_media_art_process (TrackerExtractInfo *info)
 {
-       g_return_if_fail (info != NULL);
+       g_return_val_if_fail (info != NULL, NULL);
        return info->media_art_process;
 }