Creates a music entity from a memblock. The memblock must exist. This will create a new music ID and return it The memblock must contain a valid OGG file such as one loaded with CreateMemblockFromFile(memID, "music.ogg")
2_t agk::CreateMusicFromOGGMemblock( uint32_t memID )
CreateMusicFromOGGMemblock( uint32_t musicID, uint32_t memID )