rgw/rgw_rados.cc: close resource leak in error case

Fix for:

CID 1297867 (#1 of 1): Resource leak (RESOURCE_LEAK)
 alloc_arg: put_obj_init allocates memory that is stored into
  out_stream_req.
 leaked_storage: Variable out_stream_req going out of scope leaks
  the storage it points to.

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>

Author: dalgaaf

src/rgw/rgw_rados.cc

@@ -4122,8 +4122,10 @@ int RGWRados::copy_obj_to_remote_dest(RGWObjState *astate,
   RGWRESTStreamWriteRequest *out_stream_req;
 
   int ret = rest_master_conn->put_obj_init(user_id, dest_obj, astate->size, src_attrs, &out_stream_req);
-  if (ret < 0)
+  if (ret < 0) {
+    delete out_stream_req;
     return ret;
+  }
 
   ret = read_op.iterate(0, astate->size - 1, out_stream_req->get_out_cb());
   if (ret < 0)