[gtk+] frame: Properly initialize clip

[Timm Bäder <baedert src gnome org>]

commit bbe53855419737915cfbd90bf91d785f7f1f48a8
Author: Timm Bäder <mail baedert org>
Date:   Fri Apr 28 11:26:25 2017 +0200

    frame: Properly initialize clip
    
    GtkCssGadget initializes the content clip to {0, 0, 0, 0}, so we can't
    just union the child clip with it.

 gtk/gtkframe.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkframe.c b/gtk/gtkframe.c
index fc4381c..05b603d 100644
--- a/gtk/gtkframe.c
+++ b/gtk/gtkframe.c
@@ -688,7 +688,7 @@ static void
 gtk_frame_size_allocate (GtkWidget     *widget,
                         GtkAllocation *allocation)
 {
-  GtkAllocation clip = *allocation;
+  GtkAllocation clip;
 
   gtk_widget_set_allocation (widget, allocation);
 
@@ -721,6 +721,8 @@ gtk_frame_allocate (GtkCssGadget        *gadget,
   gtk_frame_compute_child_allocation (frame, &new_allocation);
   priv->child_allocation = new_allocation;
 
+  *out_clip = *allocation;
+
   if (priv->label_widget &&
       gtk_widget_get_visible (priv->label_widget))
     {