bfb893170e
Don't do it at all in the ctor, initializing just the first element of the array is useless as it's overwritten by EncodeChar() anyhow, so just leave the task of NUL-terminating the data to this function as well. It might be even better to just have a ctor taking wxUniChar in these classes instead and make EncodeChar() a trivial wrapper around it, but for now just apply the minimal fix to repair the test breakage after the last commit. See https://github.com/wxWidgets/wxWidgets/pull/467#issuecomment-310384946