set_timeout gives ugly stack traces in unit tests

[Matt Jones]

This gives an ugly stack trace and crashes the test runner:

unittest {
    describe("thing",
        it("crash test suite", function() {
            set_timeout(function() {
                assert(false);
            }, 0.0f);
        })
    );
}

[Matt Jones (workhorsy)]

Fixed in:
http://bazaar.launchpad.net/~workhorsy/diohelper/main/revision/62