Fix parsing of negative numbers for offsets
Fix parsing of negative numbers for offsets

rdougan/DTCoreText,davbeck/DTCoreText,barz/DTCoreText,trispo/DTCoreText,yifan/DTCoreText,siuying/DTCoreText,sujeking/DTCoreText,joepasq/DTCoreText,bnickel/DTCoreText,beingenious/DTCoreText,badoo/DTCoreText,DanGe42/DTCoreText,holgersindbaek/DTCoreText,wlisac/DTCoreText,smartlogic/DTCoreText,ipodishima/DTCoreText,yifan/DTCoreText,benanderman/DTCoreText,SanjoDeundiak/DTCoreText,trispo/DTCoreText,beingenious/DTCoreText,danielphillips/DTCoreText,goodheart/DTCoreText,AmberWhiteSky/DTCoreText,wweiradio/DTCoreText,AmberWhiteSky/DTCoreText,rain1988/DTCoreText,ibru/DTCoreText,smartlogic/DTCoreText,tonycn/DTCoreText,canyu9512/DTCoreText,devontech/DTCoreText,esteluk/DTCoreText,depl0y/DTCoreText,hkg36/DTCoreText_amen_mod,shwetsolanki/DTCoreText,z8927623/DTCoreText,pivotaltracker/DTCoreText,pegli/DTCoreText,gank0326/CoreTextWithHTML,bnickel/DTCoreText,thusfresh/DTCoreText,OliverLetterer/DTCoreText,liuslevis/DTCoreText,liulinjian/DTCoreText,xiaoyanit/DTCoreText,rdougan/DTCoreText,iwakevin/DTCoreText,ricobeck/DTCoreText,kemenaran/DTCoreText,MattKiazyk/DTCoreText,youprofit/DTCoreText,pegli/DTCoreText,programming086/DTCoreText,kcoop/DTCoreText,jjamminjim/DTCoreText,Akylas/DTCoreText,zulip/DTCoreText,cnbin/DTCoreText,hkg36/DTCoreText_amen_mod,chbeer/NSAttributedString-Additions-for-HTML,wangmb/DTCoreText,1yvT0s/DTCoreText,devontech/DTCoreText,MattKiazyk/DTCoreText,wordnik/DTCoreText,Cocoanetics/DTCoreText,ipodishima/DTCoreText,shuoshi/DTCoreText,wlisac/DTCoreText,1yvT0s/DTCoreText,bastianh/DTCoreText,siuying/DTCoreText,chbeer/NSAttributedString-Additions-for-HTML,rgregg/DTCoreText,kcoop/DTCoreText,canyu9512/DTCoreText,siuying/DTCoreText,wordnik/DTCoreText,appunite/DTCoreText,wordnik/DTCoreText,SanjoDeundiak/DTCoreText,artifacts/DTCoreText,unisontech/DTCoreText,yifan/DTCoreText,artifacts/DTCoreText,ricobeck/DTCoreText,artifacts/DTCoreText,appunite/DTCoreText,joepasq/DTCoreText,tonycn/DTCoreText,w2592583/DTCoreText,artifacts/DTCoreText,gnr/DTCoreText,mirego/DTCoreText,barz/DTCoreText,jingchunYuan/DTCoreText,i-miss-you/DTCoreText,kemenaran/DTCoreText,jingchunYuan/DTCoreText,unisontech/DTCoreText,wangmb/DTCoreText,goodheart/DTCoreText,Cocoanetics/DTCoreText,gsempe/DTCoreText,zulip/DTCoreText,OliverLetterer/DTCoreText,sidslog/DTCoreText,danielphillips/DTCoreText,Torsph/DTCoreText,openresearch/DTCoreText,iwakevin/DTCoreText,liulinjian/DTCoreText,beingenious/DTCoreText,trispo/DTCoreText,benanderman/DTCoreText,CoderJWYang/DTCoreText,cnbin/DTCoreText,niklassaers/DTCoreText,wweiradio/DTCoreText,gsempe/DTCoreText,gamma/DTCoreText,wweiradio/DTCoreText,z8927623/DTCoreText,rgregg/DTCoreText,rdougan/DTCoreText,yaoxiaoyong/DTCoreText,danielphillips/DTCoreText,brightec/DTCoreText,qskycolor/DTCoreText,pegli/DTCoreText,DanGe42/DTCoreText,badoo/DTCoreText,brightec/DTCoreText,gank0326/CoreTextWithHTML,bastianh/DTCoreText,qskycolor/DTCoreText,ibru/DTCoreText,gamma/DTCoreText,jogloran/DTCoreText,niklassaers/DTCoreText,shuoshi/DTCoreText,rain1988/DTCoreText,Esdeath/DTCoreText,depl0y/DTCoreText,jogloran/DTCoreText,i-miss-you/DTCoreText,mirego/DTCoreText,sujeking/DTCoreText,Cocoanetics/DTCoreText,thusfresh/DTCoreText,Akylas/DTCoreText,davbeck/DTCoreText