ms-sbvar/test_ms_variances.mod fails under Octave with MatIO 1.5

Here is the error message:

  WHILE RUNNING MODFILE: ms-sbvar/test_ms_variances
                    MSG: load: reading matrix data for 'A0'
                IN FILE: /home/sebastien/dynare/unstable/tests/../matlab//ms-sbvar/set_ms_estimation_file.m
            IN FUNCTION: set_ms_estimation_file
     ON LINE and COLUMN: 49 and 12

Note that the problem does not occur with MatIO 1.3.