GetNextStepZ
Result is calculated Z for the next step (in next tile).
if char disconnected, or no uo files loaded - returns 0.
Pascal Syntax:
function GetNextStepZ(CurrX,CurrY, DestX, DestY : Word; WorldNum : byte; Z : ShortInt) : ShortInt;
Python Syntax:
def GetNextStepZ(CurrX, CurrY, DestX, DestY, WorldNum, CurrZ): --> byte