PCU: f_imm_ass_verify_{ul,dl}_tbf_ass(): use 'in' qualifier

We don't need a copy of the whole RR Immediate Assignment message.

Change-Id: I44417460126e507a0a47a5aee8c4a995085023fa
Signed-off-by: Vadim Yanitskiy <axilirator@gmail.com>
diff --git a/pcu/PCU_Tests.ttcn b/pcu/PCU_Tests.ttcn
index 48cdd54..e848ea6 100644
--- a/pcu/PCU_Tests.ttcn
+++ b/pcu/PCU_Tests.ttcn
@@ -359,7 +359,7 @@
 				  bts_nr := bts_nr);
 }
 
-private function f_imm_ass_verify_ul_tbf_ass(GsmRrMessage rr_imm_ass, out PacketUlAssign ul_tbf_ass)
+private function f_imm_ass_verify_ul_tbf_ass(in GsmRrMessage rr_imm_ass, out PacketUlAssign ul_tbf_ass)
 runs on RAW_PCU_Test_CT return boolean {
 
 	/* Make sure we received an UL TBF Assignment */
@@ -381,7 +381,7 @@
 	return true;
 }
 
-private function f_imm_ass_verify_dl_tbf_ass(GsmRrMessage rr_imm_ass, out PacketDlAssign dl_tbf_ass)
+private function f_imm_ass_verify_dl_tbf_ass(in GsmRrMessage rr_imm_ass, out PacketDlAssign dl_tbf_ass)
 runs on RAW_PCU_Test_CT return boolean {
 
 	/* Make sure we received a DL TBF Assignment */