[frogr] Ensure we report to the user when a video couldn't be loaded

[Mario Sanchez Prada <msanchez src gnome org>]

commit 4c1e6e37fba4f6d7f692e5272efbe44062630ad8
Author: Mario Sanchez Prada <msanchez gnome org>
Date:   Sat Dec 15 18:11:14 2012 +0100

    Ensure we report to the user when a video couldn't be loaded

 src/frogr-file-loader.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/src/frogr-file-loader.c b/src/frogr-file-loader.c
index c0b41bc..0c185ee 100644
--- a/src/frogr-file-loader.c
+++ b/src/frogr-file-loader.c
@@ -583,7 +583,7 @@ _try_get_pixbuf_for_video (FrogrFileLoader *self,
   GError *error = NULL;
 
   pixbuf = frogr_util_get_pixbuf_for_video_file (file, IV_THUMB_WIDTH, IV_THUMB_HEIGHT, &error);
-  if (error)
+  if (!pixbuf)
     {
       gchar *file_name = NULL;
       gchar *msg = NULL;
@@ -599,7 +599,8 @@ _try_get_pixbuf_for_video (FrogrFileLoader *self,
       frogr_util_show_error_dialog (GTK_WINDOW (FROGR_FILE_LOADER_GET_PRIVATE (self)->mainview), msg);
       g_free (msg);
 
-      g_error_free (error);
+      if (error)
+        g_error_free (error);
     }
 
   return pixbuf;