[opengl] check drawable and context Visual IDs in wglMakeCurrent()

[Molle Bestefich]

Tomas Carnecky wrote:
> Also, it would be great if we could put the *Swap*Buffers() into their
> own log domain, something like 'swapbuffers', because the trace is
> usually useless, only when you explicitly look whether these functions
> are called or not, otherwise they only fill the log with garbage.

Use grep -vE?

(Or completely remove it if it's useless, if someone needs to
specifically debug *Swap*Buffers() they can add trace lines
themselves..)