Reject any non-ASCII charset detected using the ASCII-compatible detector
Reject any non-ASCII charset detected using the ASCII-compatible detector

svn path=/trunk/libcss/; revision=7027

zhuyadong/libcss,prepare/netsurf_libcss,zhuyadong/libcss,zhuyadong/libcss,servo/libcss,servo/libcss,prepare/netsurf_libcss,servo/libcss,prepare/netsurf_libcss