Sometimes two guys have to share a bed, to their most displeasure, but what the hell... it's life and macho guys simply endure such things.
Seriously now... book it as one bed, get the keys the receptionist will give you at check-in. No questions asked, no answers given, not even a surprise face from the recepcionist.
Hoteliers know better not to displease their patrons. KL is a finance centre for the Muslim world, thus, business is business and money is most welcome.