rolldice: 1.14 - a simple program that rolls an amount of virtual dice

"rolldice is just a simple program that rolls an amount of virtual dice of
any size.  Well, technically, all the attributes of the dice can't exceed
SHRT_MAX, but I think it suffices for any normal FRPG."

This is my first formula and it's a pretty simple one.  I've had a look at some other formulas and I think I've done everything in the preferred way.