[mistelix] Better handle of file not found

[Jordi Mas <jmas src gnome org>]

commit cddebac348b584f9828d6ec65e6ff18e63777939
Author: Jordi Mas <jmas softcatala org>
Date:   Fri Jul 31 16:06:05 2009 +0200

    Better handle of file not found

 src/Backends/ThumbnailCache/Gnome.cs |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/src/Backends/ThumbnailCache/Gnome.cs b/src/Backends/ThumbnailCache/Gnome.cs
index a211fc9..084102d 100644
--- a/src/Backends/ThumbnailCache/Gnome.cs
+++ b/src/Backends/ThumbnailCache/Gnome.cs
@@ -116,6 +116,10 @@ namespace Mistelix.Backends.ThumbnailCache
 				factory_raw = (width > 128 || height > 128) ? factory_large : factory_normal;
 
 				time = GetTimeModified (uri);
+
+				if (time == 0)
+					return null;
+
 				// Verifies that the thumbnail exists and it is updated
 				thumbnail_raw = gnome_desktop_thumbnail_factory_lookup (factory_raw, uri, time);
 				thumbnail_file = GLib.Marshaller.Utf8PtrToString (thumbnail_raw);
@@ -155,6 +159,9 @@ namespace Mistelix.Backends.ThumbnailCache
 			try 
 			{
 				time = GetTimeModified (uri);
+				if (time == 0)
+					return;
+
 				factory_raw = (pixbuf.Width > 128 || pixbuf.Height > 128) ? factory_large : factory_normal;
 				gnome_desktop_thumbnail_factory_save_thumbnail (factory_raw, pixbuf.Handle, uri, time);
 				Logger.Debug ("Gnome.StoreThumbnail. Cached image {0}", uri);
@@ -173,6 +180,11 @@ namespace Mistelix.Backends.ThumbnailCache
 	
 			file_raw  = g_file_new_for_uri (uri);
 			fileinfo_raw =  g_file_query_info (file_raw, "time::modified", 0, IntPtr.Zero, out error_raw);
+			g_object_unref (file_raw);
+
+			if (fileinfo_raw == IntPtr.Zero) // File not found for example
+				return 0;
+
 			time = g_file_info_get_attribute_uint64 (fileinfo_raw, "time::modified");
 			return time;
 		}