[GPRS] SGSN: exit() if we cannot bind to the GTP address
diff --git a/openbsc/src/gprs/sgsn_main.c b/openbsc/src/gprs/sgsn_main.c
index e72d398..47b6c51 100644
--- a/openbsc/src/gprs/sgsn_main.c
+++ b/openbsc/src/gprs/sgsn_main.c
@@ -174,6 +174,9 @@
 	}
 
 	rc = sgsn_gtp_init(&sgsn_inst);
+	if (rc)
+		exit(2);
+
 	nsip_listen(sgsn_nsi, sgsn_inst.cfg.nsip_listen_port);
 
 	_ggsn.gtp_version = 1;