border: Don't render initial borders

Add a fast exist for comon case that the border
values are unset.

diff --git a/gtk/gtkrenderborder.c b/gtk/gtkrenderborder.c
index 220494178dbd6d0e86d685a2cf0bf95b7836513b..b574002203309232d73965098dc3553b681fc9e2 100644 (file)
--- a/gtk/gtkrenderborder.c
+++ b/gtk/gtkrenderborder.c
@@ -657,6 +657,9 @@ gtk_css_style_snapshot_border (GtkCssBoxes *boxes,
 
   border = boxes->style->border;
 
+  if (border->base.type == GTK_CSS_BORDER_INITIAL_VALUES)
+    return;
+
   if (gtk_border_image_init (&border_image, boxes->style))
     {
       cairo_t *cr;