0c98ba67f6d3bfdb386d7263a029594b359daee0 Fixed bug and added unitary tests.

================================ DYNARE MAKE CHECK MATLAB RESULTS ================================ | TOTAL: 462 | PASS: 458 | FAIL: 2 | XFAIL: 2 | XPASS: 0 | LIST OF FAILED TESTS: | * ep/rbc.mod | * ep/rbcii.mod

================================ DYNARE MAKE CHECK OCTAVE RESULTS ================================ | TOTAL: 460 | PASS: 454 | FAIL: 4 | XFAIL: 2 | XPASS: 0 | LIST OF FAILED TESTS: | * identification/kim/kim2.mod | * identification/as2007/as2007.mod | * ep/rbc.mod | * ep/rbcii.mod

A full log can be found on karaba in '/tmp/dynare-master-check-lRcTe651kd.log'.