Improve font matching in sceFontFindOptimumFont()

This seems to match correctly per my tests.  I don't know if the other parameters matter, because at least on my PSP I don't have anything that has diferent values for those parameters to test with.

This makes text look slightly less ugly in Lunar, which is now picking the right font, al thoug h,  it 'sst ill got  probl ems, and it's still too big.

-[Unknown]