Fix a small syntactic type in tokenizer.c
Fix a small syntactic type in tokenizer.c

This change I think is logically equivalent, but certainly "bitwise and"
was not intended here.  gcc 4.8 complains about it:

    astropy/io/ascii/src/tokenizer.c:683:20: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
         p += (tsep != '\0' & *p == tsep);

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