Fix warning in case session data not exist
Fix warning in case session data not exist

Warning: array_walk() expects parameter 1 to be array, null given.

webkod3r/AliDatatableBundle,webkod3r/AliDatatableBundle,zgoniaiko/AliDatatableBundle,zgoniaiko/AliDatatableBundle,AliHichem/AliDatatableBundle,AliHichem/AliDatatableBundle