DO NOT MERGE: Apply fix for tessellation fractional even test verification.

- Fix to tessellation fractional even tessellation mode verification
  calculating additional segments' length wrong if tessellation generated
  4 segments, and the additional segments were generated as first and last
  segments.

Bug: 19543594
Change-Id: I69e9a03dfcd451fc4e995eae4b5149c67dc50399
1 file changed