pre-dump: don't waste time in error cases
pre-dump: don't waste time in error cases

In error cases we need to exit immediatly

Signed-off-by: Andrew Vagin <74c05afa918858348d6db8037d82fa8124870113@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@virtuozzo.com>

AuthenticEshkinKot/criu,eabatalov/criu,AuthenticEshkinKot/criu,eabatalov/criu,eabatalov/criu,AuthenticEshkinKot/criu,KKoukiou/criu-remote,eabatalov/criu,KKoukiou/criu-remote,AuthenticEshkinKot/criu,efiop/criu,efiop/criu,KKoukiou/criu-remote,KKoukiou/criu-remote,KKoukiou/criu-remote,efiop/criu,eabatalov/criu,AuthenticEshkinKot/criu,efiop/criu,efiop/criu,KKoukiou/criu-remote,eabatalov/criu,AuthenticEshkinKot/criu,efiop/criu