More unsigned computation in chunk allocator.
More unsigned computation in chunk allocator.

darcs-hash:20080907225101-4cc09-ddaabacd8f15c8cc520dc1cb3c29282788858b51.gz

fqtools/polipo,fqtools/polipo,akkakks/polipo,berkley4/polipo,toke/polipo,jech/polipo,Android-Apps/polipo,jeromelebel/polipo,berkley4/polipo,nxtreaming/chumen,feijilei/polipo,nxtreaming/chumen,jech/polipo,galeksandrp/polipo,ssb22/polipo2,dxq-git/polipo,berkley4/polipo,strongwillow/polipo,fqtools/polipo,akkakks/polipo,lkraider/polipo,caeies/polipo-caeies,nxtreaming/chumen,feijilei/polipo,dxq-git/polipo,jech/polipo,ajmgh/polipo,gorakhargosh/polipo,galeksandrp/polipo,galeksandrp/polipo,feijilei/polipo,ssb22/polipo2,TierraDelFuego/opilop,Psiphon-Inc/polipo,Android-Apps/polipo,lkraider/polipo,doublec/namecoin-polipo,ssb22/polipo2,danchr/polipo,lkraider/polipo,clowwindy/polipo,fukusaka/polipo,strongwillow/polipo,dxq-git/polipo,akkakks/polipo