--- mozilla/mozilla/gfx/cairo/cairo/src/cairo-path-fixed.c.original	2011-05-28 09:24:53.000000000 -0400
+++ mozilla/mozilla/gfx/cairo/cairo/src/cairo-path-fixed.c	2011-06-01 17:35:19.819689227 -0400
@@ -675,11 +675,12 @@
 		 "_cairo_path_fixed_add (%s, %s)\n",
 		 op_str[(int) op], buf);
     }
 
     _cairo_path_buf_add_op (buf, op);
-    _cairo_path_buf_add_points (buf, points, num_points);
+    if (num_points)
+        _cairo_path_buf_add_points (buf, points, num_points);
 
     return CAIRO_STATUS_SUCCESS;
 }
 
 static void