Precaches a sound, only *.wav file. ( for mp3, see EngFunc_PrecacheGeneric ) This should be used only when you would need to postpone the precache processus in plugin_init() or plugin_cfg(), otherwise you should use precache_sound() native directly in plugin_precache() forward. It can be useful for example when you want to manage sounds with cvars and to avoid registering them in plugin_precache() then getting some trouble, you could manage out of this forward.
engfunc( EngFunc_PrecacheSound, "sound/MySound.wav" );
It returns the precached sound index if successful, otherwise 0.
