[libgd] GdStack: fix compiler warning

[Paolo Borelli <pborelli src gnome org>]

commit 50c03b305321e027630f97aef17a74434d9b8980
Author: Paolo Borelli <pborelli gnome org>
Date:   Sat Feb 16 17:20:25 2013 +0100

    GdStack: fix compiler warning

 libgd/gd-stack.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libgd/gd-stack.c b/libgd/gd-stack.c
index 4ec26ba..9f3b3e1 100644
--- a/libgd/gd-stack.c
+++ b/libgd/gd-stack.c
@@ -394,7 +394,7 @@ gd_stack_set_transition_position (GdStack *stack,
           priv->last_visible_pattern = NULL;
         }
 
-      gtk_widget_queue_resize (stack);
+      gtk_widget_queue_resize (GTK_WIDGET (stack));
     }
 
   return done;