gbproxy: Fix as_count_bvc_block()

we must continue to wait for more BVC-BLOCK after receiving the first one

Change-Id: I4664899414869fe373d31bc72f6c1dcfbcc9071c
diff --git a/gbproxy/GBProxy_Tests.ttcn b/gbproxy/GBProxy_Tests.ttcn
index 4f79a90..01bcb9a 100644
--- a/gbproxy/GBProxy_Tests.ttcn
+++ b/gbproxy/GBProxy_Tests.ttcn
@@ -2151,6 +2151,7 @@
 	var BSSGP_BVC_CT sgsn_bvc_ct := f_get_sgsn_bvc_ct(sgsn_idx, bvci);
 	[] SGSN_MGMT.receive(tr_BssgpStsInd(?, bvci, BVC_S_BLOCKED)) from sgsn_bvc_ct {
 		roi := roi & { bvci };
+		repeat;
 	}
 }
 /* reset the signaling BVC from one BSS; expect no signaling BVC reset on SGSN; but BVC-BLOCK for PTP */