Fix coverity issues: 33019: dereference null return value (fMotherDir).
Fix coverity issues:
33019: dereference null return value (fMotherDir).


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@43952 27541ba8-7e3a-0410-8455-c3a389f83636

bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT