4de8346154ad761e60bb33580c69b1e003afe07d Fix handling of qz_criterium in k_order_perturbation MEX.

================================ DYNARE MAKE CHECK MATLAB RESULTS ================================ | TOTAL: 417 | PASS: 415 | FAIL: 0 | XFAIL: 2 | XPASS: 0

================================ DYNARE MAKE CHECK OCTAVE RESULTS ================================ | TOTAL: 415 | PASS: 413 | FAIL: 0 | XFAIL: 2 | XPASS: 0

A full log can be found on karaba in '/tmp/dynare-4.4-check-pjFbRumOLn.log'.