--- a/render_thread_struct.h	Thu Jun 26 01:32:56 2008 +0300
+++ b/render_thread_struct.h	Thu Jun 26 02:57:20 2008 +0300
@@ -26,6 +26,9 @@
     // the notification event
     struct event ev;
 
+    // did the render fail?
+    int err;
+
     // already canceled/done?
     int is_active;
 };