Since issue42789 the AIX bot's have crashed - to the extent that the bot's did not even return results.

Part of this has been resolved, for now, by using:

$ export TERM=unknown
$ buildbot start buildarea

However, the test still crash because AIX default libcurses.a does not include support for update_lines_cols().

This patch should allow test_curses.py to pass in the buildbot.

When run from command-line as:

$ TERM=unknown ./python Lib/test/test_curses.py
.ss......ssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss
----------------------------------------------------------------------
Ran 71 tests in 0.121s

OK (skipped=64)
aixtools@cpython2:[/home/aixtools/py3a-10.0]

(When TERM is defined - a core dump still occurs - that will be a new issue and a new PR).