[gnome-shell] st-theme-node-drawing: Fix implementation of background-size

[Jasper St. Pierre <jstpierre src gnome org>]

commit 5a3de8d66334f061c0b00d28c42869a256f8fe3e
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Thu Feb 2 06:30:14 2012 -0500

    st-theme-node-drawing: Fix implementation of background-size
    
    It seems that accidentally, two variables were swapped in one code path
    of the background-size implementation, causing interesting but wrong
    images for some elements.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=633462

 src/st/st-theme-node-drawing.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/src/st/st-theme-node-drawing.c b/src/st/st-theme-node-drawing.c
index 12d86d3..08531c7 100644
--- a/src/st/st-theme-node-drawing.c
+++ b/src/st/st-theme-node-drawing.c
@@ -469,12 +469,12 @@ get_background_position (StThemeNode             *self,
   gdouble scale_w, scale_h;
 
   /* get the background image size */
-  background_image_width = allocation->x2 - allocation->x1;
-  background_image_height = allocation->y2 - allocation->y1;
+  background_image_width = cogl_texture_get_width (self->background_texture);
+  background_image_height = cogl_texture_get_height (self->background_texture);
 
   /* get the painting area size */
-  painting_area_width = cogl_texture_get_width (self->background_texture);
-  painting_area_height = cogl_texture_get_height (self->background_texture);
+  painting_area_width = allocation->x2 - allocation->x1;
+  painting_area_height = allocation->y2 - allocation->y1;
 
   /* scale if requested */
   get_background_scale (self,