designed for that.  This removes the potential error to mix data and
function pointers.

Please note that I'm a little unsure how incorrect calls to the old
ctrl functions should be handled, in som cases.  I currently return 0
and that's it, but it may be more correct to generate a genuine error
in those cases.

eliminate some of the -Wcast-qual warnings (debug-ben-strict target)

a pain to read when using 4-space tabs.

Submitted by:
Reviewed by:
PR:

Submitted by: Richard Levitte <levitte@stacken.kth.se>

under Win32 (9X and NT) again. Note: some signed/unsigned changes recently
checked in were killing the Win32 compile.