libmsc/gsm_09_11.c: avoid double zero-initialization of gsup_msg

Change-Id: Ib991b01534499401e7a0c3de49ceba770fdd9b48
diff --git a/src/libmsc/gsm_09_11.c b/src/libmsc/gsm_09_11.c
index 7e1f580..cd54703 100644
--- a/src/libmsc/gsm_09_11.c
+++ b/src/libmsc/gsm_09_11.c
@@ -57,7 +57,7 @@
 static void ncss_session_timeout_handler(void *_trans)
 {
 	struct gsm_trans *trans = (struct gsm_trans *) _trans;
-	struct osmo_gsup_message gsup_msg = { 0 };
+	struct osmo_gsup_message gsup_msg;
 
 	/* The timeout might be disabled from the VTY */
 	if (trans->net->ncss_guard_timeout == 0)