We have carried along this patch as a patch inside our sources
since 2012 (commit cfd4fcb0).

This same patch has been used also in MySQL packaging at Oracle
and in downstream Debian.org packages for both MySQL and MariaDB.

The validity of this has thus been vetted in production for years
and the review done now did not find otherwise.

Code contributed to Oracle with
http://forge.mysql.com/wiki/Sun_Contributor_Agreement

Reported as http://bugs.mysql.com/bug.php?id=31361