Marking protos as Unicode-safe

As you probably know, we keep track of the Unicode function upgrade progress at this URL: http://www.php.net/~scoates/unicode/ Currently, most of the functions are marked as unsafe or untested. However, there are plenty of extensions/functions that do not deal with strings at all and thus can be marked as Unicode-safe. ext/bcmath is one such example. Could people please go through and mark such functions with 'U' at the end of the proto line? It would help a lot. Thanks, -Andrei