fix #114: convenience function for checking if the subject changed to the parent
fix #114: convenience function for checking if the subject changed to the parent

CountOrlok/cforum,ckruse/cforum,MatthiasApsel/cforum,MatthiasApsel/cforum,ckruse/cforum,CountOrlok/cforum,MatthiasApsel/cforum,ckruse/cforum,ckruse/cforum,MatthiasApsel/cforum,CountOrlok/cforum,CountOrlok/cforum