Fixed : In some cases $this->_data can be NULL which produces a warning. 
Fixed : In some cases $this->_data can be NULL which produces a warning. 

timble/kodekit-platform,nooku/nooku-platform,nooku/nooku-platform,nooku/nooku-platform,timble/kodekit-platform,timble/kodekit-platform,nooku/nooku-platform,timble/kodekit-platform,nooku/nooku-platform,timble/kodekit-platform