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.
The following fixes several bugs:
1) Mismatch between docs and game in definition of what '+' resolved in
favor of docs...
2) When game needs to be recovered a message box is shown. This is a very
deprecated fix. It pretty much answers just the conditions that require
this (a yn question to an erroneous winid), and is not useful for other
purposes.
3) The score file is written.
