Bug 67855 fix

Good evening all

I've put together a patch for bug 67855 which can be seen here:
https://github.com/php/php-src/pull/778

The patch has so far received no feedback - does anyone have any?

If no-one has any objections to this, I would like to merge it into
master. This patch has a very minor BC break, as it changes a boolean
return value to an integer which may be zero, so it targets master
only.

Thanks, Chris