shader compiler: map VertexIndex to VertexID
authorGregF <greg@LunarG.com>
Sat, 23 Jan 2016 00:55:49 +0000 (17:55 -0700)
committerGregF <greg@LunarG.com>
Sat, 23 Jan 2016 01:02:10 +0000 (18:02 -0700)
This is not a perfect implementation of VertexIndex. It assumes a base of zero.
Also pickup latest LunarGLASS that (truly) supports VertexIndex
Also re-enable ir_validate for undeclared variables

LunarGLASS_revision_R32