zdtm: fix warnings in mmx00.c
zdtm: fix warnings in mmx00.c

mmx00.c:22:34: warning: array subscript is above array bounds
[-Warray-bounds]
mmx00.c:22:34: warning: array subscript is above array bounds
[-Warray-bounds]

PSUBW handles 64 bits.

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