[gtk+] Fix mem leak introduced with my previous commit

[Siegfried-Angel Gevatter Pujals <sgevatter src gnome org>]

commit 0d9d3025c6869208a191a4662dfd76b3606abc22
Author: Siegfried-Angel Gevatter Pujals <rainct ubuntu com>
Date:   Tue Jan 24 19:05:29 2012 +0100

    Fix mem leak introduced with my previous commit

 gtk/gtkrecentmanager.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkrecentmanager.c b/gtk/gtkrecentmanager.c
index c3929ed..283482d 100644
--- a/gtk/gtkrecentmanager.c
+++ b/gtk/gtkrecentmanager.c
@@ -753,7 +753,7 @@ gtk_recent_manager_add_item_query_info (GObject      *source_object,
       g_object_unref (file_info);
     }
   else
-    recent_data.mime_type = g_content_type_guess (g_file_get_basename (file), NULL, 0, NULL);
+    recent_data.mime_type = g_content_type_guess (uri, NULL, 0, NULL);
 
   recent_data.app_name = g_strdup (g_get_application_name ());
   recent_data.app_exec = g_strjoin (" ", g_get_prgname (), "%u", NULL);