r335: - hexToChar(): remove calls to printf() and exit().  Add support for lowercase hex digits.  General cleanups.
r335: - hexToChar(): remove calls to printf() and exit().  Add support for
lowercase hex digits.  General cleanups.

cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr