Do proper test and don't leave dialogs hanging...

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@48127 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -11207,7 +11207,7 @@ static int handle_request(struct sip_pvt *p, struct sip_request *req, struct soc
 		error = 1;
 	}
 	if (error) {
-		if (!p->initreq.header)	/* New call */
+		if (!p->initreq.headers)	/* New call */
 			ast_set_flag(p, SIP_NEEDDESTROY);	/* Make sure we destroy this dialog */
 		return -1;
 	}