Somehow some some #include "language.h" were lost with PaulH's recent 
*_string_custom cleanup.

Rather than add lots of those includes, I moved the hex_string and 
hex_string_custom functions to utils.c, and the corresponding 
declaration to defs.h.  I also took the oportunity to improve the code a 
little switching it to get_cell().

Paul,

To answer your question about my thoughts on get_cell - I think it sux 
less than the old code's local static buffer :-)

committed,
Andrew