[gtk+] border-image: don't try to unpack values from a NULL border-image

[Cosimo Cecchi <cosimoc src gnome org>]

commit 42d7487a6ed2aa041b35110725f5768b092cd976
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Thu Jun 9 14:54:00 2011 -0400

    border-image: don't try to unpack values from a NULL border-image
    
    NULL is a valid value for border-image, so if it's NULL when unpacking,
    don't try to access the struct fields, but just init the GValues for the
    unpacked parameters.

 gtk/gtkborderimage.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtkborderimage.c b/gtk/gtkborderimage.c
index 2770078..b6cf778 100644
--- a/gtk/gtkborderimage.c
+++ b/gtk/gtkborderimage.c
@@ -139,15 +139,19 @@ _gtk_border_image_unpack (const GValue *value,
 
   parameter[0].name = "border-image-source";
   g_value_init (&parameter[0].value, CAIRO_GOBJECT_TYPE_PATTERN);
-  g_value_set_boxed (&parameter[0].value, image->source);
 
   parameter[1].name = "border-image-slice";
   g_value_init (&parameter[1].value, GTK_TYPE_BORDER);
-  g_value_set_boxed (&parameter[1].value, &image->slice);
 
   parameter[2].name = "border-image-repeat";
   g_value_init (&parameter[2].value, GTK_TYPE_CSS_BORDER_IMAGE_REPEAT);
-  g_value_set_boxed (&parameter[2].value, &image->repeat);
+
+  if (image != NULL)
+    {
+      g_value_set_boxed (&parameter[0].value, image->source);
+      g_value_set_boxed (&parameter[1].value, &image->slice);
+      g_value_set_boxed (&parameter[2].value, &image->repeat);
+    }
 
   *n_params = 3;
   return parameter;