Undo the change about testing on obj=0 in AddEntry(const char *name,..)
Even if that does not sound logical obj=0 is valid. In particular when a macro with a Legend is saved as a .C file.


git-svn-id: https://root.cern.ch/svn/root/trunk@49189 27541ba8-7e3a-0410-8455-c3a389f83636