ccs is a size_t.  RAY_CCS_INDEX takes ccs and does math on it, resulting in a size_t due to C's rules of arithmetic.  Rather than bogusly cast the result to a uint8_t, fix the printf format specifier to have a 'z' modifier which tells the compiler that the sizes really do match.
ccs is a size_t.  RAY_CCS_INDEX takes ccs and does math on it,
resulting in a size_t due to C's rules of arithmetic.  Rather than
bogusly cast the result to a uint8_t, fix the printf format specifier
to have a 'z' modifier which tells the compiler that the sizes really
do match.

It turns out that change 1.75 was incorrect to assume that this
'really' was a 8bit quantity.  It isn't.  Although the hardware
appears to limit things to < 256, it would be a bug that should be
caught by debug printf it it were.  Casting it to uint8_t would have
lost this useful information.

Aslo add 'z' to a nearby debug statement that's never compiled in.

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