tests/test-break.c: Only test Thai breaks with libthai available
Hi,
This attempts to fix the tests in test-break.c when libthai is not present, by skipping four.break unless libthai is found.
The four.break test data file involves the Thai language, meaning that this test will fail unless we have libthai. Skip this test unless libthai is found.
With blessings, thank you!