Protect the TH1 destructor when deleting objects in the list of functions. It may happen that one of the objects in this list is also included in other lists and has already been deleted.
Protect the TH1 destructor when deleting objects in the list of functions.
It may happen that one of the objects in this list is also included
in other lists and has already been deleted.


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@11478 27541ba8-7e3a-0410-8455-c3a389f83636

dawehner/root,dawehner/root,dawehner/root,dawehner/root,bbannier/ROOT,bbannier/ROOT,dawehner/root,dawehner/root,bbannier/ROOT,dawehner/root,bbannier/ROOT,dawehner/root,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT