avoid NULL-dereference upon malloc failure
avoid NULL-dereference upon malloc failure

* config.c (parseAtom): Correct typo: s/buf/s/

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