[gnome-shell] StTextureCache: Fix a fallout from GTask port

[Kalev Lember <klember src gnome org>]

commit df0b465e76305e011c5106d78b6fd19891db900d
Author: Kalev Lember <klember redhat com>
Date:   Sun Nov 1 00:21:10 2015 +0100

    StTextureCache: Fix a fallout from GTask port
    
    Set the task data that load_pixbuf_thread func expects.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=757418

 src/st/st-texture-cache.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/st/st-texture-cache.c b/src/st/st-texture-cache.c
index d4a4ee9..88c6bf3 100644
--- a/src/st/st-texture-cache.c
+++ b/src/st/st-texture-cache.c
@@ -575,6 +575,7 @@ load_texture_async (StTextureCache       *cache,
   if (data->file)
     {
       GTask *task = g_task_new (cache, NULL, on_pixbuf_loaded, data);
+      g_task_set_task_data (task, data, NULL);
       g_task_run_in_thread (task, load_pixbuf_thread);
       g_object_unref (task);
     }