Fix SlicedLowLevelWCS so it dosen't return a list when there is only one dimension
Fix SlicedLowLevelWCS so it dosen't return a list when there is only one dimension

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