More ticket #1033: Fixed send_msg_callback of transaction.c to reset 'cont' flag to stop (re)transmitting when transaction has been unregistered.

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@3114 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjsip/src/pjsip/sip_transaction.c b/pjsip/src/pjsip/sip_transaction.c
index 3ff1301..282c41c 100644
--- a/pjsip/src/pjsip/sip_transaction.c
+++ b/pjsip/src/pjsip/sip_transaction.c
@@ -1659,6 +1659,7 @@
      * notification (https://trac.pjsip.org/repos/ticket/1033).
      */
     if (tdata->mod_data[mod_tsx_layer.mod.id] == NULL) {
+	*cont = PJ_FALSE;
 	return;
     }