ns2: message: allow to pass a foreign NSVCI to STATUS PDU

To answer correct on a BLOCK PDU with a different NSVCI, the
STATUS PDU needs also a NSVCI parameter.

Change-Id: I373eb48697097cdfa45748a091c11f7b3f0345fa
diff --git a/src/gb/gprs_ns2_internal.h b/src/gb/gprs_ns2_internal.h
index a5d78d4..0959d2b 100644
--- a/src/gb/gprs_ns2_internal.h
+++ b/src/gb/gprs_ns2_internal.h
@@ -439,7 +439,7 @@
 		     struct msgb *msg);
 
 int ns2_tx_status(struct gprs_ns2_vc *nsvc, uint8_t cause,
-		       uint16_t bvci, struct msgb *orig_msg);
+		  uint16_t bvci, struct msgb *orig_msg, uint16_t *nsvci);
 
 /* driver */
 struct gprs_ns2_vc *ns2_ip_bind_connect(struct gprs_ns2_vc_bind *bind,