dsound: Handle failing of IDsDriver_CreateSoundBuffer better

[Maarten Lankhorst]

Vitaliy Margolen schreef:
> And this really fixes the bug, doesn't just hide the error message? If
> it fixed, then there should be no messages at all. I really do not
> want to have people opening bugs because something crashes/sound
> doesn't work, etc.
It fixes it, there might be some caps difference from falling back, but
should be harmless, if you really want to, that is easy to fix, too.

Cheers,
Maarten