-extern cvar_t mastervolume;
-extern cvar_t bgmvolume;
-extern cvar_t volume;
-extern cvar_t snd_initialized;
-extern cvar_t snd_staticvolume;
-extern cvar_t snd_mutewhenidle;
+extern struct cvar_s mastervolume;
+extern struct cvar_s bgmvolume;
+extern struct cvar_s volume;
+extern struct cvar_s snd_initialized;
+extern struct cvar_s snd_staticvolume;
+extern struct cvar_s snd_mutewhenidle;