Minor fixes, compiled on msys2

Fix in screen refresh is quite useful; besides that, not much new.

First fully working C version

Finished fixing all the functionalities after porting the code from Pascal to C.

editing Original War saved game file with BArrEd:

Mega mirror of the Binary Win32 release:
https://mega.co.nz/#!gZckUJBY!zjLWe88x2igNDHtyVGJEK6eF4NATJDS-s04iwCMGeP4