When I load the game, I get this and the fireball.ogg from the ghast mob doesn't load when I launch the game. Here is when the game loads

[12:59:03] [Client thread/INFO]: Setting user: Legoman99573
[12:59:04] [Client thread/INFO]: (Session ID is token:03521c3122a44b97aac87576f4e647dd:d0260928676e455787ddcbd457e8ff7d)
[12:59:14] [Client thread/INFO]: LWJGL Version: 2.9.1
[12:59:18] [Client thread/INFO]: Reloading ResourceManager: Default
[12:59:19] [Sound Library Loader/INFO]: Starting up SoundSystem...
[12:59:19] [Thread-6/INFO]: Initializing LWJGL OpenAL
[12:59:19] [Thread-6/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[12:59:19] [Client thread/WARN]: File minecraft:sounds/mob/ghast/fireball.ogg does not exist, cannot add it to event minecraft:item.fireCharge.use
[12:59:20] [Thread-6/INFO]: OpenAL initialized.
[12:59:20] [Sound Library Loader/INFO]: Sound engine started
[12:59:32] [Client thread/INFO]: Created: 512x512 textures-atlas
[13:18:50] [Client thread/INFO]: Stopping!
[13:18:50] [Client thread/INFO]: SoundSystem shutting down...
[13:18:50] [Client thread/WARN]: Author: Paul Lamb, www.paulscode.com