Fix reading of unsigned 8 bit integer with compressed fits
Fix reading of unsigned 8 bit integer with compressed fits

StuartLittlefair/astropy,pllim/astropy,StuartLittlefair/astropy,saimn/astropy,stargaser/astropy,saimn/astropy,saimn/astropy,mhvk/astropy,aleksandr-bakanov/astropy,mhvk/astropy,StuartLittlefair/astropy,dhomeier/astropy,dhomeier/astropy,aleksandr-bakanov/astropy,MSeifert04/astropy,MSeifert04/astropy,larrybradley/astropy,StuartLittlefair/astropy,lpsinger/astropy,MSeifert04/astropy,dhomeier/astropy,lpsinger/astropy,stargaser/astropy,pllim/astropy,larrybradley/astropy,saimn/astropy,mhvk/astropy,astropy/astropy,pllim/astropy,aleksandr-bakanov/astropy,pllim/astropy,stargaser/astropy,dhomeier/astropy,dhomeier/astropy,lpsinger/astropy,larrybradley/astropy,astropy/astropy,lpsinger/astropy,aleksandr-bakanov/astropy,astropy/astropy,lpsinger/astropy,larrybradley/astropy,astropy/astropy,astropy/astropy,pllim/astropy,MSeifert04/astropy,stargaser/astropy,mhvk/astropy,StuartLittlefair/astropy,larrybradley/astropy,mhvk/astropy,saimn/astropy