fix crash if INFO or PARAM tag has no name
fix crash if INFO or PARAM tag has no name

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