Fix issues where repeated messages where ignored, but retransmitted reliably instead of unreliably.

Reported by: johan
Patches: 
      12746.txt uploaded by oej (license 306)
Tested by: johan
(issue #12746)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@128912 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -14100,7 +14100,8 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
 			else
 				ast_log(LOG_DEBUG, "Got a SIP re-transmit of INVITE for call %s\n", p->callid);
 		}
-		reinvite = 1;
+		if (!ast_test_flag(req, SIP_PKT_IGNORE))
+			reinvite = 1;
 		c = p->owner;
 	}