* tests/scale_test.c (enum test_kind): New test for 2x5 scale.
(test_names): Add new test name.
(LAST_TEST): Set to new test.
(do_verify_window_size): New function.
(test_single_step): Verify window sizes as well. Implement new
test.
* tests/test_harness.c (verify_window_size): New function.
* tests/test_harness.h: New prototype.