stp: Fix ttcn3 parser error on some Titan versions

It is a known bug that some verisons of titan don't support having
several alt cases without any separator. This is already fixed in
master, but it doesn't hurt adding them to have them compile on other
versions.

Change-Id: I999d4cc5c1c26b8bbdf8b30ad8dfdc8f55ca433b
diff --git a/stp/STP_Tests_M3UA.ttcn b/stp/STP_Tests_M3UA.ttcn
index f6fa625..58e52d3 100644
--- a/stp/STP_Tests_M3UA.ttcn
+++ b/stp/STP_Tests_M3UA.ttcn
@@ -367,8 +367,8 @@
 		rx_pd := tr_M3UA_protocol_data(pc_sender, pc_receiver, '23'O, '00'O, '00'O, '00'O, data);
 		f_M3UA_send(0, ts_M3UA_DATA(rctx_sender, tx_pd), 1);
 		alt {
-		[] as_count_rx(1, tr_M3UA_DATA(rctx_receiver, rx_pd), num_rx[1])
-		[] as_count_rx(2, tr_M3UA_DATA(rctx_receiver, rx_pd), num_rx[2])
+		[] as_count_rx(1, tr_M3UA_DATA(rctx_receiver, rx_pd), num_rx[1]);
+		[] as_count_rx(2, tr_M3UA_DATA(rctx_receiver, rx_pd), num_rx[2]);
 		}
 	}
 	/* FIXME: check for extraneous messages? */