[bf1942] Map Change Crash

[Ryan C. Gordon]

> Oh, and just out of curiosity... why remove the playbink entry point?
> Wouldn't it just be easier to have a function that does nothing but
> return, just to cut down on the weird messages?

There's thousands of wierd messages anyhow (since sometimes the scripts
have "comments" stuck in them...random text the engine throws away
anyhow...)

Some entry points were removed because the functionality required headers
I don't have (DirectX, Bink, etc), and it was easier to just chop widely.
A stub function isn't practical when the function signature references
types you don't have.

--ryan.