tree acb3fba2898181a321b89d1c90db8c7abac4c622
parent 7f83d473ba1d32963e5430b9172d9738dafbbe15
author Bill Hollings <bill.hollings@brenwill.com> 1574802712 -0500
committer Bill Hollings <bill.hollings@brenwill.com> 1574802712 -0500

Fix tessellation break when control stage declares but does not use position builtin.

Add SPIRVShaderOutput::isUsed retrieved from shader reflection.
mvk::sizeOfOutput() returns zero if output var is not used.
Update to latest SPIRV-Cross version.