Use method_exists() instead of is_callable(), which was causing __autoload() to try to load a non-existent class, resulting in 'Could not include class file 332w83sshopo4s.php' when a FormControl validator was called.
Use method_exists() instead of is_callable(), which was causing __autoload() to try to load a non-existent class, resulting in 'Could not include class file 332w83sshopo4s.php' when a FormControl validator was called.

git-svn-id: d0e296eae3c99886147898d36662a67893ae90b2@1594 653ae4dd-d31e-0410-96ef-6bf7bf53c507

dragonmantank/Habari,dragonmantank/Habari,dragonmantank/Habari