Set a default EXTNAME for CompImageHDU
Set a default EXTNAME for CompImageHDU

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