Fixed bug introduced by fix [0] and discussed [1].

[0]
https://github.com/propelorm/Propel/commit/dcace442d4dc0302f2db568b0550af73a53532ad

[1]
https://github.com/propelorm/Propel/commit/dcace442d4dc0302f2db568b0550af73a53532ad
Merge pull request #854 from stevleibelt/master

Fixed bug introduced by fix [0] and discussed [1].