Tests say matrices apply mask to last col (kinda.)

It seems inconsistent but probably better than before.  Also add an error.
vi2uc, etc. should apply the D prefix as float.

So say tests on an actual PSP.
Mark a bunch of VFPU functions which eat prefixes.
Add a few more OUT_EAT_PREFIX flags to VFPU.
Merge pull request #734 from unknownbrackets/jit-vfpu

Mark a bunch of VFPU ops that eat prefixes