Compatibility fix: in geometric centering, use @rdivide instead of @mrdivide

@rdivide is actually more correct, because we’re not doing an
element-by-element division.

And, more importantly, MATLAB R2009b does not accept @mrdivide in bsxfun.
3 jobs for master in 1 minute and 21 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #6474
testsuite_matlab

00:00:44

failed #6476
allowed to fail
testsuite_octave

00:01:19

passed #6475
testsuite_old_matlab

00:01:13

 
Name Stage Failure
failed
testsuite_octave Test
/home/gitlab-runner/builds/2084817d/0/sebastien/dseries/tests/../src/utilities/x13/printoption.m                                      Unit test number  1  PASS    [  0.0236449 ]
/home/gitlab-runner/builds/2084817d/0/sebastien/dseries/tests/../src/utilities/x13/printspan.m Unit test number 1 PASS [ 0.010613 ]
/home/gitlab-runner/builds/2084817d/0/sebastien/dseries/tests/../src/utilities/x13/printspan.m Unit test number 2 PASS [ 0.00996494 ]
/home/gitlab-runner/builds/2084817d/0/sebastien/dseries/tests/../src/utilities/x13/printspan.m Unit test number 3 PASS [ 0.00942516 ]
/home/gitlab-runner/builds/2084817d/0/sebastien/dseries/tests/../src/utilities/x13/printstart.m Unit test number 1 PASS [ 0.0079391 ]
/home/gitlab-runner/builds/2084817d/0/sebastien/dseries/tests/../src/utilities/x13/setdefaultmember.m Unit test number 1 PASS [ 0.00558305 ]

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