MDLSITE-2127 Support recent phploc versions.

Nothing important. It's just the "Project Size" job, @ the laptop, that stopped working recently, after upgrading all the pear stuff.

http://stronk7.doesntexist.com/job/R00.%20Project%20size%20report%20(master)/

With this change it will be back to normal, supporting recent versions of phploc.

Ciao :-)