More carefully log unknown GE commands.

Need FLAG_EXECUTE or they won't log, we were only getting the
ReapplyGfxState() ones before.  Let's skip 0 to not log those as well.
Initialize some psmf values.

This was causing glitches when loading game A and then game B.
Detect tricks with depthbuffers and report them.

Tons of games share framebuffers though, but data is good...