Fix failure with old versions of Numpy
Fix failure with old versions of Numpy

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