Handled 2 errors. 1. When calloc fails. 2. If ZNAXIS keyword is not present in header.
Handled 2 errors.
1. When calloc fails.
2. If ZNAXIS keyword is not present in header.

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