* libc/stdio/vfprintf.c (_VFPRINTF_R): Use actual length of

	* libc/stdio/vfprintf.c (_VFPRINTF_R): Use actual length of
	radix char instead of assuming length 1.
	* libc/stdlib/gdtoa-gethex.c: Remove use of USE_LOCALE.
	(gethex): Allow multibyte decimal point.
	Fix compiler warnings due to different signedness of pointer types.
	* libc/stdlib/strtod.c: Remove use of USE_LOCALE.
	(_strtod_r): Allow multibyte decimal point.
	* libc/stdlib/wcstod.c (_wcstod_r): Evaluate correct wide char
	endptr position if the decimal point is a multibyte char.