[gegl] Fix leak of cache item

[Daniel Sabo <daniels src gnome org>]

commit d6893aba8b4ecab23ea35befd493d93602de1cbe
Author: Daniel Sabo <DanielSabo gmail com>
Date:   Wed Oct 9 10:23:27 2013 -0700

    Fix leak of cache item
    
    Cause by changes in 7b4ef2b677c78cf27fcb985a00ac4f532f785140

 gegl/buffer/gegl-tile-handler-cache.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gegl/buffer/gegl-tile-handler-cache.c b/gegl/buffer/gegl-tile-handler-cache.c
index e97b43d..3719c0e 100644
--- a/gegl/buffer/gegl-tile-handler-cache.c
+++ b/gegl/buffer/gegl-tile-handler-cache.c
@@ -504,6 +504,8 @@ gegl_tile_handler_cache_void (GeglTileHandlerCache *cache,
       gegl_tile_void (item->tile);
       gegl_tile_unref (item->tile);
     }
+
+  g_slice_free (CacheItem, item);
 }
 
 void