gprs_ns2: use zero initialized memory for vty_binds

Change-Id: I5635d98c52948fddcc375e1be9b1cd04aa32bc3c
diff --git a/src/gb/gprs_ns2_vty2.c b/src/gb/gprs_ns2_vty2.c
index e8738c1..41daa74 100644
--- a/src/gb/gprs_ns2_vty2.c
+++ b/src/gb/gprs_ns2_vty2.c
@@ -108,7 +108,7 @@
 
 static struct vty_bind *vty_bind_alloc(const char *name)
 {
-	struct vty_bind *vbind = talloc(vty_nsi, struct vty_bind);
+	struct vty_bind *vbind = talloc_zero(vty_nsi, struct vty_bind);
 	if (!vbind)
 		return NULL;