dump: return a negative value in case of error
dump: return a negative value in case of error

Signed-off-by: Andrey Vagin <74c05afa918858348d6db8037d82fa8124870113@openvz.org>
Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@parallels.com>

wtf42/criu,tych0/criu,wtf42/criu,efiop/criu,tych0/criu,fbocharov/criu,marcosnils/criu,tych0/criu,sdgdsffdsfff/criu,gonkulator/criu,fbocharov/criu,rentzsch/criu,wtf42/criu,sdgdsffdsfff/criu,gablg1/criu,wtf42/criu,tych0/criu,marcosnils/criu,KKoukiou/criu-remote,LK4D4/criu,sdgdsffdsfff/criu,marcosnils/criu,tych0/criu,kawamuray/criu,biddyweb/criu,eabatalov/criu,LK4D4/criu,KKoukiou/criu-remote,gablg1/criu,biddyweb/criu,rentzsch/criu,kawamuray/criu,ldu4/criu,tych0/criu,wtf42/criu,wtf42/criu,efiop/criu,svloyso/criu,svloyso/criu,kawamuray/criu,AuthenticEshkinKot/criu,gablg1/criu,LK4D4/criu,KKoukiou/criu-remote,gonkulator/criu,LK4D4/criu,gonkulator/criu,rentzsch/criu,gablg1/criu,eabatalov/criu,ldu4/criu,sdgdsffdsfff/criu,eabatalov/criu,efiop/criu,rentzsch/criu,LK4D4/criu,gablg1/criu,gablg1/criu,gonkulator/criu,rentzsch/criu,kawamuray/criu,ldu4/criu,svloyso/criu,kawamuray/criu,sdgdsffdsfff/criu,LK4D4/criu,efiop/criu,sdgdsffdsfff/criu,KKoukiou/criu-remote,fbocharov/criu,fbocharov/criu,efiop/criu,svloyso/criu,gonkulator/criu,biddyweb/criu,biddyweb/criu,KKoukiou/criu-remote,eabatalov/criu,marcosnils/criu,biddyweb/criu,AuthenticEshkinKot/criu,marcosnils/criu,svloyso/criu,AuthenticEshkinKot/criu,AuthenticEshkinKot/criu,rentzsch/criu,kawamuray/criu,fbocharov/criu,gonkulator/criu,eabatalov/criu,AuthenticEshkinKot/criu,biddyweb/criu,svloyso/criu,ldu4/criu,KKoukiou/criu-remote,ldu4/criu,marcosnils/criu,AuthenticEshkinKot/criu,fbocharov/criu,eabatalov/criu,ldu4/criu,efiop/criu