Warnings from matrix_size



Dear list,

The first time I use the matrix_size command I get the following strange message as follows:

Maxima 5.28.0 http://maxima.sourceforge.net
using Lisp CLISP 2.49 (2010-07-07)
Distributed under the GNU Public License. See the file COPYING.
Dedicated to the memory of William Schelter.
The function bug_report() provides bug reporting information.
(%i1)  matrix_size(matrix([1,2,3],[4,5,6]));
0 errors, 0 warnings
(%o1)                               [2, 3]

Why do I get "0 errors, 0 warnings" and how can this be suppressed?

Chris