Merged revisions 257191 via svnmerge from

https://origsvn.digium.com/svn/asterisk/trunk

........
  r257191 | tilghman | 2010-04-13 14:17:48 -0500 (Tue, 13 Apr 2010) | 10 lines
  
  Also unref the pvt when we delete the provisional keepalive job.
  
  (closes issue #16774)
   Reported by: kowalma
   Patches: 
         20100315__issue16774.diff.txt uploaded by tilghman (license 14)
   Tested by: falves11, jamicque
  
  Review: https://reviewboard.asterisk.org/r/591/
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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.0@257206 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -5220,7 +5220,7 @@ static int sip_hangup(struct ast_channel *ast)
 				}
 			} else {	/* Incoming call, not up */
 				const char *res;
-				AST_SCHED_DEL(sched, p->provisional_keepalive_sched_id);
+				AST_SCHED_DEL_UNREF(sched, p->provisional_keepalive_sched_id, dialog_unref(p));
 				if (p->hangupcause && (res = hangup_cause2sip(p->hangupcause)))
 					transmit_response_reliable(p, res, &p->initreq);
 				else