[ublas] array based constructor for diagonal_matrix

From: Vardan Akopian (vakopian_at_[hidden])
Date: 2005-07-11 21:33:13

Hi All,

Is there a good reason why the diognal_matrix does not have an array
based constructor, while the banded_matrix does (which diagonal_matrix
inherits from). If it's just an omission, I attach a patch here to fix
it.

Thanks
-Vardan