sheep/gateway Remove warning ‘nr_vids’ may be used uninitialized in t…

…his function

gateway.c:696: warning: ‘nr_vids’ may be used uninitialized in this function

Signed-off-by: Hongzhou Zhang <hongzhou.h.zhang@intel.com>
Signed-off-by: Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>
(cherry picked from commit e36699b)

sheep/gateway.c

@@ -691,7 +691,7 @@ int gateway_write_obj(struct request *req)
 	uint32_t *vids = NULL, *new_vids = req->data;
 	struct generation_reference *refs = NULL, *zeroed_refs = NULL;
 	struct update_obj_refcnt_work *refcnt_work;
-	size_t nr_vids;
+	size_t nr_vids = hdr->data_length / sizeof(*vids);
 
 	if ((req->rq.flags & SD_FLAG_CMD_TGT) &&
 	    is_refresh_required(oid_to_vid(oid))) {
@@ -707,8 +707,6 @@ int gateway_write_obj(struct request *req)
 
 
 	if (is_data_vid_update(hdr)) {
-		nr_vids = hdr->data_length / sizeof(*vids);
-
 		invalidate_other_nodes(oid_to_vid(oid));
 
 		/* read the previous vids to discard their references later */