sdl2-mixer, explicitely disable wavepack and xmp

Hi.

This diff to prevent libxmp and libwavepack from being picked up.
Or we do the opposite and add support, I have no opinion.

Index: Makefile
===================================================================
RCS file: /cvs/ports/devel/sdl2-mixer/Makefile,v
retrieving revision 1.17
diff -u -p -r1.17 Makefile
--- Makefile 23 Feb 2024 20:35:32 -0000 1.17
+++ Makefile 25 Feb 2024 12:17:30 -0000
@@ -24,6 +24,8 @@ LIB_DEPENDS = audio/opusfile \

CONFIGURE_STYLE = gnu
CONFIGURE_ARGS += --disable-music-midi-fluidsynth \
+ --disable-music-wavpack \
+ --disable-music-mod-xmp \
--disable-music-mod-modplug-shared \
--disable-music-opus-shared


--
Antoine