* c-lex.c (lex_number): Use ISXDIGIT/hex_value.
	* vax/xm-vms.h (FILE_NAME_NONDIRECTORY): Use ISUPPER/TOLOWER.
	* fold-const.c (real_hex_to_f): Use hex_value.
	* real.c (asctoeg): Use hex_value & ISXDIGIT.
	* toplev.c (toplev_main): Call hex_init.
	* tradcpp.c (main): Call hex_init.

From-SVN: r48068