ea6ee19402fb0f25d9441214b94a819f3f7e56eb More Octave compatibility fixes wrt catch

================================ DYNARE MAKE CHECK MATLAB RESULTS ================================ | TOTAL: 208 | PASS: 207 | FAIL: 0 | XFAIL: 1 | XPASS: 0

================================ DYNARE MAKE CHECK OCTAVE RESULTS ================================ | TOTAL: 206 | PASS: 205 | FAIL: 0 | XFAIL: 1 | XPASS: 0

A full log can be found on karaba in '/tmp/dynare-master-check-xTXR7WMw8G.log'.