#2532 spinbox-1.8.4 fails

[Don Porter]

Tk HEAD just started reporting this
in the full `make test` results:

spinbox.test

==== spinbox-1.8.4 -validate option: FAILED
==== Contents of test case:

.sb configure -validate all -validatecommand {lappend ::spinbox_test %P}
pack .sb
.sb set 50
focus .sb
after 100 {set ::spinbox_wait 1} ; vwait ::spinbox_wait
set ::spinbox_test

---- Result was:

---- Result should have been (exact matching):
50
==== spinbox-1.8.4 FAILED

Running just the spinbox.test files results
in no failure, so this is probably a test
isolation problem.