Should usage of the EIGEN_UNUSED_VARIABLE() macro require a trailing semi-colon, or not? i.e. should one use: ``` EIGEN_UNUSED_VARIABLE(size) ``` or ``` EIGEN_UNUSED_VARIABLE(size); ``` Most of the codebase does the latter, but there are at least a dozen or so that do the former. I'd like to get eigen having no -Wextra-semi-stmt warnings and I'll submit an MR, but I'd like to know first whether to add a bunch of semi-colons or remove them. :)