Fixes a regression introduced by 70891e45c0a8b53400b3d9399af8249cc37fb466 which was only tending to show up on Windows (though could in rare cases occur on OSX as well).  Basically if 'arr' is a recarray or FITS_rec, slicing it doesn't work as this code expects.
Fixes a regression introduced by 70891e45c0a8b53400b3d9399af8249cc37fb466 which was only tending to show up on Windows (though could in rare cases occur on OSX as well).  Basically if 'arr' is a recarray or FITS_rec, slicing it doesn't work as this code expects.

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