bug pointed out by stkn, thanks\!

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3008 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/endpoints/mod_sofia/mod_sofia.c

@@ -2944,7 +2944,7 @@ static void event_callback(nua_event_t event,
 			switch_channel_t *channel = switch_core_session_get_channel(tech_pvt->session);
 			switch_channel_hangup(channel, SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER);
 			nua_respond(nh, SIP_401_UNAUTHORIZED, TAG_END());
-			return;
+			goto done;
 		}
 	}
 	
@@ -3067,6 +3067,8 @@ static void event_callback(nua_event_t event,
 
 	}
 
+ done:
+
 	if (session) {
 		switch_core_session_rwunlock(session);
 	}