[gtk+/wip/blur] Take the bigger box to create the box-shadow surface

[Andrea Cimitan <acimitan src gnome org>]

commit 402262922a667dac6d60a25bdf15130a8a1d64db
Author: Andrea Cimitan <andrea cimitan canonical com>
Date:   Mon Apr 16 15:13:16 2012 +0100

    Take the bigger box to create the box-shadow surface

 gtk/gtkshadow.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtkshadow.c b/gtk/gtkshadow.c
index 6b602c1..eeab349 100644
--- a/gtk/gtkshadow.c
+++ b/gtk/gtkshadow.c
@@ -498,16 +498,20 @@ _gtk_box_shadow_render (GtkShadow           *shadow,
           cairo_t *cr_surface;
           cairo_surface_t *surface;
           gint bradius;
-          gdouble x, y;
+          gdouble x, y, width, height;
 
           bradius = element->radius;
 
           cairo_get_current_point (cr, &x, &y);
 
+          /* Take the bigger box to create the surface. */
+          width = MAX (padding_box->box.width, box.box.width);
+          height = MAX (padding_box->box.height, box.box.height);
+
           /* Create a larger surface to center the blur. */
           surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
-                                                padding_box->box.width + bradius * 2,
-                                                padding_box->box.height + bradius * 2);
+                                                width + bradius * 2,
+                                                height + bradius * 2);
           cr_surface = cairo_create (surface); 
 
           /* Center the rendering. */