xmp: give ALSA output higher priority than OSS

OSS does not offer software volume control, which means people always
get the maximum volume with it on sufficiently dumb hardware. Prefer
the ALSA output, which has appropriate defaults configured.

src/sound.c

@@ -72,15 +72,15 @@ void init_sound_drivers()
 #ifdef SOUND_WIN32
 	register_sound_driver(&sound_win32);
 #endif
-#ifdef SOUND_OSS
-	register_sound_driver(&sound_oss);
-#endif
 #ifdef SOUND_ALSA
 	register_sound_driver(&sound_alsa);
 #endif
 #ifdef SOUND_ALSA05
 	register_sound_driver(&sound_alsa05);
 #endif
+#ifdef SOUND_OSS
+	register_sound_driver(&sound_oss);
+#endif
 #ifdef SOUND_QNX
 	register_sound_driver(&sound_qnx);
 #endif