c8ac7007f00d5dce45b8155e12504c922e10dd24 fixing bug in test case of standalone c++

================================ DYNARE MAKE CHECK MATLAB RESULTS ================================ | TOTAL: 490 | PASS: 483 | FAIL: 4 | XFAIL: 3 | XPASS: 0 | LIST OF FAILED TESTS: | * fs2000/fs2000_calib_dseries.mod | * ep/rbc.mod | * ep/rbcii.mod | * deterministic_simulations/homotopy.mod

================================ DYNARE MAKE CHECK OCTAVE RESULTS ================================ | TOTAL: 484 | PASS: 473 | FAIL: 8 | XFAIL: 3 | XPASS: 0 | LIST OF FAILED TESTS: | * fs2000/fs2000_calib_dseries.mod | * identification/kim/kim2.mod | * identification/as2007/as2007.mod | * ep/rbc.mod | * ep/rbcii.mod | * deterministic_simulations/homotopy.mod | * ../matlab/@dseries/detrend.m#1 | * ../matlab/lyapunov_symm.m#1

A full log can be found on karaba in '/tmp/dynare-master-check-aXoO00QyGB.log'.