wined3d: direct3d.c variable-names request

[Andrew Talbot]

This request is aimed at the wined3d specialists.

Hi,

I'm looking to fix a couple of write-strings warnings in direct3d.c: lines
323 and 334, the second parameter to Callback(), but I don't know enough to
give suitable names to the intended substitute variables. So I would be
glad of suggestions, please.

Thanks,

-- Andy.