warnings in dmusic_segment.c and dmusic_synth.c

[Gerald Pfeifer]

I'm getting the following warnings with the new code in dlls/dmusic:

dmusic_segment.c:475: warning: initialization from incompatible pointer type
 dmusic_segment.c:477: warning: initialization from incompatible pointer type
 dmusic_synth.c:179: warning: initialization from incompatible pointer type
 dmusic_synth.c:373: warning: initialization from incompatible pointer type
 dmusic_synth.c:388: warning: initialization from incompatible pointer type

This is both on SuSE Linux 8.1 and FreeBSD 4.8, so it seems like a
generic issue; would you mind having a look?

Thanks,
Gerald