Applying Eli Lindsey's patch to Yaniv Kunda's report in LANG-936 that StringUtils.getLevensteinDistance(String, String, int) gave the wrong answer when the int threshold is near Integer.MAX_VALUE

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@1560275 13f79535-47bb-0310-9956-ffa450edef68