Tom Finegan authored Sep 07, 2017 and James Zern committed Sep 08, 2017

When building without SSE4 support some compilers complain about
an unused variable. Typically gcc's with a major version of 4.
Guard the declaration of the offending var within a
HAVE_SSE4_1 block to avoid the problem.

Change-Id: I4e4deb46014c97f3157f3b6c2376e1b034a51b62