c08c34223dcd7cc12068ba70ad01b854ea470d5f Fixed typo and bug in MCMC diagnostics.

================================ DYNARE MAKE CHECK MATLAB RESULTS ================================ | TOTAL: 199 | PASS: 198 | FAIL: 0 | XFAIL: 1 | XPASS: 0

Dynare failed to compile or Octave testsuite failed to run

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