PCU: respect the PCU-side "local port" as configured via L1 IF

This makes sure that the UDP local port of the Gb link is actually
set to what is configured via OML from OpenBSC.
diff --git a/src/pcu_l1_if.cpp b/src/pcu_l1_if.cpp
index 6b8b3fe..8d98c1e 100644
--- a/src/pcu_l1_if.cpp
+++ b/src/pcu_l1_if.cpp
@@ -420,7 +420,8 @@
 	LOGP(DL1IF, LOGL_DEBUG, " remote_port=%d\n", info_ind->remote_port[0]);
 	LOGP(DL1IF, LOGL_DEBUG, " remote_ip=%d\n", info_ind->remote_ip[0]);
 
-	rc = gprs_bssgp_create(info_ind->remote_ip[0], info_ind->remote_port[0],
+	rc = gprs_bssgp_create(info_ind->local_port[0],
+		info_ind->remote_ip[0], info_ind->remote_port[0],
 		info_ind->nsei, info_ind->nsvci[0], info_ind->bvci,
 		info_ind->mcc, info_ind->mnc, info_ind->lac, info_ind->rac,
 		info_ind->cell_id);