Index: wireshark-1.4.4/epan/packet.c
===================================================================
--- wireshark-1.4.4.orig/epan/packet.c
+++ wireshark-1.4.4/epan/packet.c
@@ -321,6 +321,7 @@ dissect_packet(epan_dissect_t *edt, unio
 	edt->pi.annex_a_used = MTP2_ANNEX_A_USED_UNKNOWN;
 	edt->pi.dcerpc_procedure_name="";
 	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;