HexagonVectorPrint.cpp: Fix r277370. Don't use getInstrVecReg() in the expression of assert(). It has side effects.
HexagonVectorPrint.cpp: Fix r277370. Don't use getInstrVecReg() in the expression of assert(). It has side effects.

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@277448 91177308-0d34-0410-b5e6-96231b3b80d8

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