Fix some rather large memory leaks in the wcs bindings.
Fix some rather large memory leaks in the wcs bindings.

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