--- openbox-3.5.0/openbox/moveresize.c.orig	2012-11-27 15:05:26.963273019 -0500
+++ openbox-3.5.0/openbox/moveresize.c	2012-11-27 15:05:36.219234195 -0500
@@ -326,6 +326,11 @@
 #endif
     }
 
+    if (moveresize_client == NULL) {
+        fprintf(stderr, "Error: moveresize_end: moveresize_client is NULL\n");
+        return;
+    }
+
     /* don't use client_move() here, use the same width/height as
        we've been using during the move, otherwise we get different results
        when moving maximized windows between monitors of different sizes !