ntdll: Don't change RtlWaitOnAddress size after user invoke_apc.

This makes the next iteration to immediately return STATUS_SUCCESS
because of compare_addr returning FALSE with size == 0.

Signed-off-by: Rémi Bernon <rbernon@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dlls/ntdll/sync.c

@@ -2504,7 +2504,6 @@ NTSTATUS WINAPI RtlWaitOnAddress( const void *addr, const void *cmp, SIZE_T size
              * but we don't want to wait */
             abs_timeout = 0;
             user_apc = TRUE;
-            size = 0;
         }
     }