Fix Next(), it was returning functions from the global

scope in addition to the class methods.

Fix handling of data members which are cached values
derived from calling member functions of other data
members.  They were not always reset when their master
data member was changed.

-- Paul Russo


git-svn-id: http://root.cern.ch/svn/root/trunk@24057 27541ba8-7e3a-0410-8455-c3a389f83636