Don't free private structure until iax2_hangup is actually called

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2136 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_iax2.c

@@ -1038,8 +1038,10 @@ retry:
 			goto retry;
 		}
 	}
+	if (!owner)
 		iaxs[callno] = NULL;
 	if (pvt) {
+		if (!owner)
 			pvt->owner = NULL;
 		/* No more pings or lagrq's */
 		if (pvt->pingid > -1)
@@ -1063,7 +1065,6 @@ retry:
 
 		if (owner) {
 			/* If there's an owner, prod it to give up */
-			owner->pvt->pvt = NULL;
 			owner->_softhangup |= AST_SOFTHANGUP_DEV;
 			ast_queue_hangup(owner, 0);
 		}
@@ -1076,6 +1077,7 @@ retry:
 		if (pvt->reg) {
 			pvt->reg->callno = 0;
 		}
+		if (!owner)
 			free(pvt);
 	}
 	if (owner) {