Constants K_ARROW etc., for causes of death other than monsters, are in
the 240-255 range. They were often passed to functions taking char,
which is usually signed, making the values out of range.
The function declarations have been changed to unsigned char, which is
also the type used by the scoreboard code.
Functions for starting and stopping daemons and fuses now expect the
type 'void (*func)()'. Only a few functions in XRogue needed to be
modified to fit. Determining the type of the argument is left for a
later date.
Building with GCC5 should now produce less than 200 lines of warnings
per game.
