BUG_ON_HANDLER from util.h may be used in restorer.
E.g. #include <util.h>
     #include <lock.h>

Now the process will be segfaulted and you can find a line
number in assemgler code. We will print messages a bit late.
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>