[eigen] clang analyzer warnings

[Rick Mann <rmann@xxxxxxxxxxxxxxx>]

Hi guys. I just ran the clang static analyzer on Eigen 3.2.0, and there are only a few (trivial) complaints. There are four "dead stores" (assignments to variables never referenced). MathFunction.h lines 129 ("tmp"), 198 ("tmp"), 282, ("xmm2"), and 381 ("xmm2”).

I wanted to ensure there's not some side-effect of those calls, and ask about reporting making a change request to remove the code.

Thanks!

-- 
Rick

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