[sdlsound] DLS support.

[Ryan C. Gordon]

Eric Wing wrote:
> Hi, I think there might be a minor problem. The code
> makes calls to SDL_Error. However, SDL_Error doesn't
> seem to be an exported library function for SDL and
> seems to be for internal use. It lacks the DECLSPEC
> SDLCALL qualifiers. This is preventing me from
> building successfully in OSX, and I presume this would
> also be a Windows issue.

Fixed...Pull the latest from CVS and try again.

--ryan.