BUG: Update BRAINSTools to fix mask checks

Created by: fedorov

This should resolve the regression introduced in r24963 that caused failing EMSegment test. The problem was identified and solution proposed by @jcfr

$ git shortlog 29d203c...16526a5 --no-merges Andrey Fedorov (1): BUG: fix mask checks for centerOfROI initializer

cc: @hjmjohnson

also see https://github.com/Slicer/Slicer/pull/468