test-lib-main.sh: avoid chmod ""
commit037cb7caed039d02048443bd9059cec0c1212dca
authorKyle J. McKay <mackyle@gmail.com>
Wed, 15 Feb 2017 19:31:38 +0000 (15 11:31 -0800)
committerKyle J. McKay <mackyle@gmail.com>
Wed, 15 Feb 2017 19:31:38 +0000 (15 11:31 -0800)
treeb002d6a5b1b97d3d990f32f29008b2a3dffab2f0
parentb81f4146ba252c871061f21dfd45095387f744b0
test-lib-main.sh: avoid chmod ""

With the `--debug` option the trash directory is preserved and
the variable pointing to it is set to empty.

Avoid trying to use the empty variable as a directory name.

Mention in the README-TESTLIB that `--debug` has this effect too.

Signed-off-by: Kyle J. McKay <mackyle@gmail.com>
t/README-TESTLIB
t/test-lib-main.sh