Getting YY_CURRENT_BUFFER when using reentrant scanner

Hi List,

Just wondering how you are using YY_CURRENT_BUFFER in a reentrant scanner.

When using the %option reentrant, I have to do the following hack to use the 
YY_CURRENT_BUFFER in a function that only takes the yyscan_t yyscanner as 
parameter.

struct yyguts_t * yyg = (struct yyguts_t*)yyscanner; /* <== HACK HACK */

yy_flush_buffer((YY_CURRENT_BUFFER),yyscanner);

Is there anyother way, that doesnt require the yyg variable ?

thanks for your help
Henrik