ns2: check if ns_vc_alloc() fails in bind_connect()

Change-Id: I82c984b9808451a72a62ff03b0495a1d09473e1c
diff --git a/src/gb/gprs_ns2_udp.c b/src/gb/gprs_ns2_udp.c
index 0676314..26a0483 100644
--- a/src/gb/gprs_ns2_udp.c
+++ b/src/gb/gprs_ns2_udp.c
@@ -379,6 +379,9 @@
 	struct priv_vc *priv;
 
 	nsvc = ns2_vc_alloc(bind, nse, true);
+	if (!nsvc)
+		return NULL;
+
 	nsvc->priv = talloc_zero(bind, struct priv_vc);
 	if (!nsvc->priv) {
 		gprs_ns2_free_nsvc(nsvc);