[grits] Fix warning if with non-existent cache paths

[Andy Spencer <andys src gnome org>]

commit 782f6b5a0985384b68f2a4f233eef0541efd4c94
Author: Andy Spencer <andy753421 gmail com>
Date:   Wed Nov 2 07:18:48 2011 +0000

    Fix warning if with non-existent cache paths

 src/data/grits-http.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/data/grits-http.c b/src/data/grits-http.c
index 19b751f..76e68a4 100644
--- a/src/data/grits-http.c
+++ b/src/data/grits-http.c
@@ -249,7 +249,7 @@ GList *grits_http_available(GritsHttp *http,
 		const gchar *file;
 		gchar *path = _get_cache_path(http, cache);
 		GDir  *dir  = g_dir_open(path, 0, NULL);
-		while ((file = g_dir_read_name(dir)))
+		while (dir && (file = g_dir_read_name(dir)))
 			if (g_regex_match(filter_re, file, 0, NULL))
 				files = g_list_prepend(files, g_strdup(file));
 		g_free(path);