dates.subsref: compatibility fix for MATLAB < R2010b

Provide an alternative implementation of ismatrix.
4 jobs for master in 1 minute and 59 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #6442
testsuite_matlab

00:00:57

failed #6444
allowed to fail
testsuite_octave

00:01:34

failed #6445
allowed to fail
testsuite_old_matlab

00:00:51

failed #6443
allowed to fail
testsuite_old_matlab

00:00:02

 
Name Stage Failure
failed
testsuite_old_matlab Test
/home/gitlab-runner/builds/a354a37e/0/sebastien/dseries/tests/../src/utilities/x13/printoption.m                                      Unit test number  1  PASS    [ 0.011205 ]
/home/gitlab-runner/builds/a354a37e/0/sebastien/dseries/tests/../src/utilities/x13/printspan.m Unit test number 1 PASS [ 0.004486 ]
/home/gitlab-runner/builds/a354a37e/0/sebastien/dseries/tests/../src/utilities/x13/printspan.m Unit test number 2 PASS [ 0.002724 ]
/home/gitlab-runner/builds/a354a37e/0/sebastien/dseries/tests/../src/utilities/x13/printspan.m Unit test number 3 PASS [ 0.002667 ]
/home/gitlab-runner/builds/a354a37e/0/sebastien/dseries/tests/../src/utilities/x13/printstart.m Unit test number 1 PASS [ 0.002975 ]
/home/gitlab-runner/builds/a354a37e/0/sebastien/dseries/tests/../src/utilities/x13/setdefaultmember.m Unit test number 1 PASS [ 0.002331 ]

make: *** [Makefile:14: check-matlab] Error 1
ERROR: Job failed: exit status 1
failed
testsuite_octave Test
/home/gitlab-runner/builds/79277319/0/sebastien/dseries/tests/../src/utilities/x13/printoption.m                                      Unit test number  1  PASS    [  0.0232038 ]
/home/gitlab-runner/builds/79277319/0/sebastien/dseries/tests/../src/utilities/x13/printspan.m Unit test number 1 PASS [ 0.00924397 ]
/home/gitlab-runner/builds/79277319/0/sebastien/dseries/tests/../src/utilities/x13/printspan.m Unit test number 2 PASS [ 0.00810623 ]
/home/gitlab-runner/builds/79277319/0/sebastien/dseries/tests/../src/utilities/x13/printspan.m Unit test number 3 PASS [ 0.00747108 ]
/home/gitlab-runner/builds/79277319/0/sebastien/dseries/tests/../src/utilities/x13/printstart.m Unit test number 1 PASS [ 0.00611186 ]
/home/gitlab-runner/builds/79277319/0/sebastien/dseries/tests/../src/utilities/x13/setdefaultmember.m Unit test number 1 PASS [ 0.00369 ]

make: *** [Makefile:10: check-octave] Error 1
ERROR: Job failed: exit status 1