--- descriptors.c.orig	2009-10-22 14:13:16.000000000 +0100
+++ descriptors.c	2009-10-22 14:11:50.000000000 +0100
@@ -426,6 +426,9 @@
       free(ifp->altsetting);
     }
 
+    if (cf->extra) //greg
+      free(cf->extra);
+
     free(cf->interface);
   }
   free(dev->config);