close File yyin before calling yylex_destroy
close File yyin before calling yylex_destroy

This patch makes sure file handler yyin is closed.
yylex_destroy() calls yy_init_globals(), which reset yyin to 0.
Therefore if we do not close yyin before yylex_destroy(), yyin
will not be closed anymore.

freedesktop-unofficial-mirror/xorg__app__intel-gen4asm,freedesktop-unofficial-mirror/xorg__app__intel-gen4asm