If unspecified, default normal to 0, 0, 1

Fixes Trails in the Sky buttons and improves Kingdom Hearts lighting in the intro, seems to improve ingame buttons.

Tried a number of other games, 3d and 2d, didn't seem to hurt any of them.

Does seem to make one scene of KH overbright (in the intro), but I haven't actually played it on my PSP yet.

-[Unknown]