Game Output Ghast Client error

[Client thread/WARN]: File minecraft:sounds/mob/ghast/fireball.ogg does not exist, cannot add it to event minecraft:item.fireCharge.use

This may be either because fireball.ogg is not in the Minecraft 1.8-pre2 version server, or because it has beed removed from the launcher's assets. Either one. Good luck on 1.8 Mojang!

Sincerly,
jonathanjc3242