criu: lazy-pages: don't modify variable used in a loop

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/uffd.c

@@ -730,10 +730,11 @@ static int handle_requests(int epollfd, struct epoll_event *events)
 		}
 
 		for (i = 0; i < ret; i++) {
+			int err;
 			lpi = uffd_to_lpi(events[i].data.fd);
 			BUG_ON(!lpi);
-			ret = handle_user_fault(lpi, dest);
-			if (ret < 0)
+			err = handle_user_fault(lpi, dest);
+			if (err < 0)
 				goto out;
 		}
 	}