make sure NDDataArray has no memory leak
make sure NDDataArray has no memory leak

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