[gtk+] GtkStack: Avoid compiler warnings

[Matthias Clasen <matthiasc src gnome org>]

commit 3957ce48981144b13ddc4fe72c871e844b364ba8
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri May 2 17:15:49 2014 -0400

    GtkStack: Avoid compiler warnings
    
    gcc warns about unhandled enum values in these switch statements,
    so add an empty default: case to placate the compiler.

 gtk/gtkstack.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkstack.c b/gtk/gtkstack.c
index 2534da6..ebe1658 100644
--- a/gtk/gtkstack.c
+++ b/gtk/gtkstack.c
@@ -754,6 +754,7 @@ get_simple_transition_type (gboolean               new_child_first,
       return new_child_first ? GTK_STACK_TRANSITION_TYPE_UNDER_RIGHT : GTK_STACK_TRANSITION_TYPE_OVER_LEFT;
     case GTK_STACK_TRANSITION_TYPE_OVER_RIGHT_LEFT:
       return new_child_first ? GTK_STACK_TRANSITION_TYPE_UNDER_LEFT : GTK_STACK_TRANSITION_TYPE_OVER_RIGHT;
+    default: ;
     }
   return transition_type;
 }
@@ -916,6 +917,7 @@ effective_transition_type (GtkStack               *stack,
           return GTK_STACK_TRANSITION_TYPE_UNDER_RIGHT;
         case GTK_STACK_TRANSITION_TYPE_UNDER_RIGHT:
           return GTK_STACK_TRANSITION_TYPE_UNDER_LEFT;
+        default: ;
         }
     }