d5da4065449645f25bce0e0e17a3e3ebb8831914 Fixed bug in dseries constructor introduced in 4e1c26db.

================================ DYNARE MAKE CHECK MATLAB RESULTS ================================ | TOTAL: 440 | PASS: 438 | FAIL: 0 | XFAIL: 2 | XPASS: 0

================================ DYNARE MAKE CHECK OCTAVE RESULTS ================================ | TOTAL: 438 | PASS: 436 | FAIL: 0 | XFAIL: 2 | XPASS: 0

A full log can be found on karaba in '/tmp/dynare-master-check-5WneOKwANd.log'.