[gtk+] Allow to use -gtk-icon-source for handles

[Matthias Clasen <matthiasc src gnome org>]

commit f8950bf8780423a65607b6a6983b39d90f7232d4
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Jul 13 13:56:14 2014 -0400

    Allow to use -gtk-icon-source for handles
    
    This will let us use icons for touch selection handles, once
    they use gtk_render_handle.

 gtk/gtkthemingengine.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkthemingengine.c b/gtk/gtkthemingengine.c
index 402634d..ac4009e 100644
--- a/gtk/gtkthemingengine.c
+++ b/gtk/gtkthemingengine.c
@@ -2252,6 +2252,9 @@ gtk_theming_engine_render_handle (GtkThemingEngine *engine,
   gint xx, yy;
   gboolean has_image;
 
+  if (render_icon_image (engine, cr, x, y, width, height))
+    return;
+
   cairo_save (cr);
   flags = gtk_theming_engine_get_state (engine);