Tactics Ogre - Knights of Lodis has weird background effect

[DaveTCode]

Not sure exactly when this bug was introduced but it's present on both the audio branch and main at time of writing. I'm 95% sure that it was working before I implemented the scheduler but there's a lot that's changed in the meantime

[DaveTCode]

#50 shows the last time I was working on this rom and has screenshots showing the background without psychedelics!