[gnome-shell] st-theme-node: reset paint state when theme node changes

[Lionel Landwerlin <llandwerlin src gnome org>]

commit fd83990d8a5012cd149f089e68850fc84c47538c
Author: Lionel Landwerlin <llandwerlin gmail com>
Date:   Thu Jul 18 00:58:47 2013 +0100

    st-theme-node: reset paint state when theme node changes
    
    https://bugzilla.gnome.org/show_bug.cgi?id=704430

 src/st/st-theme-node-drawing.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/src/st/st-theme-node-drawing.c b/src/st/st-theme-node-drawing.c
index 74751dc..dc5b817 100644
--- a/src/st/st-theme-node-drawing.c
+++ b/src/st/st-theme-node-drawing.c
@@ -2392,7 +2392,13 @@ st_theme_node_paint (StThemeNode           *node,
   if (width <= 0 || height <= 0)
     return;
 
-  if (st_theme_node_needs_new_box_shadow_for_size (state, node, width, height))
+  /* Check whether we need to recreate the textures of the paint
+   * state, either because :
+   *  1) the theme node associated to the paint state has changed
+   *  2) the allocation size change requires recreating textures
+   */
+  if (state->node != node ||
+      st_theme_node_needs_new_box_shadow_for_size (state, node, width, height))
     {
       /* If we had the ability to cache textures on the node, then we
          can just copy them over to the paint state and avoid all