Don't show ticks in invalid WCS regions
Don't show ticks in invalid WCS regions

funbaker/astropy,tbabej/astropy,kelle/astropy,bsipocz/astropy,saimn/astropy,aleksandr-bakanov/astropy,kelle/astropy,pllim/astropy,larrybradley/astropy,tbabej/astropy,dhomeier/astropy,mhvk/astropy,astropy/astropy,bsipocz/astropy,AustereCuriosity/astropy,tbabej/astropy,dhomeier/astropy,MSeifert04/astropy,astropy/astropy,AustereCuriosity/astropy,kelle/astropy,lpsinger/astropy,dhomeier/astropy,StuartLittlefair/astropy,DougBurke/astropy,aleksandr-bakanov/astropy,tbabej/astropy,saimn/astropy,saimn/astropy,bsipocz/astropy,kelle/astropy,larrybradley/astropy,astropy/astropy,mhvk/astropy,lpsinger/astropy,MSeifert04/astropy,funbaker/astropy,stargaser/astropy,dhomeier/astropy,tbabej/astropy,lpsinger/astropy,AustereCuriosity/astropy,aleksandr-bakanov/astropy,kelle/astropy,stargaser/astropy,larrybradley/astropy,larrybradley/astropy,mhvk/astropy,funbaker/astropy,MSeifert04/astropy,aleksandr-bakanov/astropy,MSeifert04/astropy,DougBurke/astropy,StuartLittlefair/astropy,DougBurke/astropy,joergdietrich/astropy,AustereCuriosity/astropy,mhvk/astropy,joergdietrich/astropy,joergdietrich/astropy,pllim/astropy,pllim/astropy,dhomeier/astropy,funbaker/astropy,bsipocz/astropy,astropy/astropy,lpsinger/astropy,joergdietrich/astropy,pllim/astropy,saimn/astropy,saimn/astropy,DougBurke/astropy,StuartLittlefair/astropy,StuartLittlefair/astropy,astropy/astropy,AustereCuriosity/astropy,StuartLittlefair/astropy,joergdietrich/astropy,stargaser/astropy,stargaser/astropy,lpsinger/astropy,mhvk/astropy,larrybradley/astropy,pllim/astropy