Fixed null reference expression for some operations (Tobias' patch).
Fixed null reference expression for some operations (Tobias' patch).

yatsek/IronAHK,polyethene/IronAHK,michaltakac/IronAHK,michaltakac/IronAHK,michaltakac/IronAHK,michaltakac/IronAHK,yatsek/IronAHK,yatsek/IronAHK,polyethene/IronAHK,polyethene/IronAHK,yatsek/IronAHK,yatsek/IronAHK,polyethene/IronAHK,michaltakac/IronAHK