modules/outbound: Fixes the crash but is logically incorrect for outbound

- Not sure why the crash happened at all - but this fix breaks the outbound logic

Revert "outbound Fix core dump crash"

This reverts commit 6369444761d44526ded2620e33438abb182d2bdc.

modules/outbound/ob_mod.c

@@ -294,7 +294,7 @@ int use_outbound(struct sip_msg *msg)
 
 	/* Look for ;reg-id in REGISTER Contact-URIs and ;ob in any
 	   Contact-URIs */
-	if (msg->contact && parse_headers(msg, HDR_CONTACT_F, 0) != -1)
+	if (msg->contact || parse_headers(msg, HDR_CONTACT_F, 0) != -1)
 	{
 		if (parse_contact(msg->contact) < 0)
 		{