--- ./epan/packet.c.orig	2011-12-01 18:42:33.000000000 +0100
+++ ./epan/packet.c	2011-12-01 18:49:28.000000000 +0100
@@ -344,6 +344,7 @@
 	edt->pi.clnp_srcref = 0;
 	edt->pi.clnp_dstref = 0;
 	edt->pi.link_dir = LINK_DIR_UNKNOWN;
+	edt->tvb = NULL;
 
 	/* to enable decode as for ethertype=0x0000 (fix for bug 4721) */
 	edt->pi.ethertype = G_MAXINT;
