fix the Matrix(int,int)/vector 2D ctors issue so that we really have a Matrix(Scalar,Scalar) ctor. (useful for std::complex, user defined types, etc.
fix the Matrix(int,int)/vector 2D ctors issue so that we really
have a Matrix(Scalar,Scalar) ctor. (useful for std::complex, user
defined types, etc.

madlib/eigen,madlib/eigen,madlib/eigen,madlib/eigen