3602a0b1a80cae7267e58e353f86b10ddd54e0b7 Fix bug in pm3 for filtered variables that led to crashes.

================================ DYNARE MAKE CHECK MATLAB RESULTS ================================ | TOTAL: 525 | PASS: 515 | FAIL: 7 | XFAIL: 3 | XPASS: 0 | LIST OF FAILED TESTS: | * estimation/MH_recover/fs2000_recover.mod | * simul/simul_ZLB_purely_forward_no_solution.mod | * ep/rbc.mod | * ep/rbc2.mod | * ep/rbcii.mod | * ep/linearmodel.mod | * run_reporting_test_matlab.m

================================ DYNARE MAKE CHECK OCTAVE RESULTS ================================ | TOTAL: 519 | PASS: 504 | FAIL: 12 | XFAIL: 3 | XPASS: 0 | LIST OF FAILED TESTS: | * estimation/MH_recover/fs2000_recover.mod | * initval_file/ramst_initval_file.mod | * simul/simul_ZLB_purely_forward_no_solution.mod | * recursive/ls2003_bayesian_xls.mod | * ep/rbc.mod | * ep/rbc2.mod | * ep/rbcii.mod | * ep/linearmodel.mod | * optimizers/fs2000_7.mod | * run_reporting_test_octave.m | * ../matlab/lyapunov_symm.m#1 | * ../matlab/utilities/general/name2tex.m#4

A full log can be found at http://www.dynare.org/testsuite/master