RESP3: remove other pointless shared object.

src/t_list.c

@@ -298,7 +298,7 @@ void linsertCommand(client *c) {
         server.dirty++;
     } else {
         /* Notify client of a failed insert */
-        addReply(c,shared.cnegone);
+        addReplyLongLong(c,-1);
         return;
     }