fix single-byte BufferedInputStream.read to generate unsigned result
fix single-byte BufferedInputStream.read to generate unsigned result

MaartenR/avian,badlogic/avian,getlantern/avian,getlantern/avian,joshuawarner32/avian,bigfatbrowncat/avian-pack.avian,MaartenR/avian,lostdj/avian,lostdj/avian,ucdseniordesign/avian,joshuawarner32/avian,minor-jason/avian,bgould/avian,lostdj/avian,MaartenR/avian,ucdseniordesign/avian,bgould/avian,dicej/avian,lwahlmeier/avian,joshuawarner32/avian,marcinolawski/avian,minor-jason/avian,badlogic/avian,minor-jason/avian,bgould/avian,lwahlmeier/avian,dicej/avian,marcinolawski/avian,dicej/avian,bigfatbrowncat/avian-pack.avian,MaartenR/avian,ucdseniordesign/avian,badlogic/avian,lwahlmeier/avian,minor-jason/avian,bigfatbrowncat/avian-pack.avian,getlantern/avian,marcinolawski/avian,lwahlmeier/avian,marcinolawski/avian,badlogic/avian,getlantern/avian,ucdseniordesign/avian,bgould/avian,lostdj/avian,joshuawarner32/avian,dicej/avian,bigfatbrowncat/avian-pack.avian