BSSGP_Emulation: Fix transmission of MT L3 in LLC/BSSGP

it seems that some part of the code was commented out, breaking
the path where a ConnHdlr is sending a L3 MT message.

Change-Id: Ie652598292f2fbd2e1e0c4aa679ff0d68d78c88c
diff --git a/library/BSSGP_Emulation.ttcn b/library/BSSGP_Emulation.ttcn
index 8988926..9021f08 100644
--- a/library/BSSGP_Emulation.ttcn
+++ b/library/BSSGP_Emulation.ttcn
@@ -586,7 +586,7 @@
 		var BIT4 sapi := f_llc_sapi_by_l3_mt(l3_mt);
 		var integer n_u := f_llc_get_n_u_tx(ClientTable[idx].llc[bit2int(sapi)]);
 		var octetstring llc_enc := enc_PDU_LLC(valueof(ts_LLC_UI(l3_enc, sapi, '1'B, n_u)));
-		//BSCP.send(f_BnsUdReq(ts_BSSGP_DL_UD(ClientTable[idx].tlli, ClientTable[idx].cell_id, llc_enc)), g_cfg.bvci);
+		BSCP.send(f_BnsUdReq(ts_BSSGP_DL_UD(ClientTable[idx].tlli, llc_enc), g_cfg.bvci));
 	}
 
 	[] BSSGP_SP.receive(PDU_LLC:?) -> value llc sender vc_conn {