tests: Don't add extra padding if counter mod 40 is 0

tests: Don't add extra padding if counter mod 40 is 0

This change only affects the output of tests that have an exact
multiple of 40 test cases. For example the domainschematest currently:

TEST: domainschematest
      ........................................ 40
      ........................................ 80
      ........................................ 120
      ........................................ 160
      ........................................                                         200 OK
PASS: domainschematest

It outputs additional 40 spaces on the last line.

The domainschematest output is fixed by the change in test-lib.sh. The
change in testutils.c fixes this for tests written in C. Currently no
C test has an exact multiple of 40 test cases, but I checked it and
the same problem exists there.

This patch stops that in both cases.