Add absent prototypes to some core routines.
Also add some port function() to function(void) in some win32 routines.
Also updates the Borland C Makefile for win32.
This patch allows the digits 0-9 to be used to indicate line numbers
in the MAP...ENDMAP arrays of level files. This makes it a wee
bit easier to place features. The digits get stripped out before
the map is interpreted.
