Crash in test MonteCarlo2D.RunSampleDataset under 32 bits builds

[jlblancoc]

From buildlog in Ubuntu PPA machines:

[==========] Running 5 tests from 3 test cases.
[----------] Global test environment set-up.
[----------] 1 test from MonteCarlo2D
[ RUN ] MonteCarlo2D.RunSampleDataset
test_mrpt_slam: /usr/include/eigen3/Eigen/src/Core/CwiseBinaryOp.h:131: Eigen::CwiseBinaryOp<BinaryOp, Lhs, Rhs>::CwiseBinaryOp(const Lhs&, const Rhs&, const BinaryOp&) [with BinaryOp = Eigen::internal::scalar_product_op<float, float>; Lhs = const Eigen::ArrayWrapper<const Eigen::Map<Eigen::Matrix<float, -1, 1>, 0, Eigen::Stride<0, 0> > >; Rhs = const Eigen::ArrayWrapper<const Eigen::Matrix<float, -1, 1> >]: Assertion `aLhs.rows() == aRhs.rows() && aLhs.cols() == aRhs.cols()' failed.
Aborted