Removed redundant odd/even check in Trapezoid kernels.
Removed redundant odd/even check in Trapezoid kernels.

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