Gb: avoid warnings about not-running timers

If we have  T.timeout  clause in an alt/altstep, we should put
[T.running] as guard expression to avoid warnings about matching
on timers never started - at least for timers where this is a valid
situation.

Change-Id: I96db5c288e0b9c47539cccab8ae7a886d0b9fff3
diff --git a/library/BSSGP_Emulation.ttcn b/library/BSSGP_Emulation.ttcn
index c4628be..06e4733 100644
--- a/library/BSSGP_Emulation.ttcn
+++ b/library/BSSGP_Emulation.ttcn
@@ -453,7 +453,7 @@
 }
 
 altstep as_blocked() runs on BSSGP_CT {
-	[] g_T1.timeout {
+	[g_T1.running] g_T1.timeout {
 		f_sendUnblock();
 	}
 	[] BSCP.receive(f_BnsUdInd(t_BVC_UNBLOCK_ACK(g_cfg.bvci), 0)) {
@@ -483,7 +483,7 @@
 		g_T1.stop;
 		f_change_state(BVC_S_BLOCKED);
 	}
-	[] g_T1.timeout {
+	[g_T1.running] g_T1.timeout {
 		f_sendBlock(BSSGP_CAUSE_OM_INTERVENTION);
 	}
 	[] BSCP.receive(f_BnsUdInd(t_BVC_BLOCK_ACK(g_cfg.bvci), 0)) -> value udi {