Fix a problem observed with slc6/gcc47


git-svn-id: svn+ssh://svn.cern.ch/reps/atlasoff/Control/DataModel/trunk@540077 4525493e-7705-40b1-a816-d608a930855b
clang warning fixes.


git-svn-id: svn+ssh://svn.cern.ch/reps/atlasoff/Control/DataModel/trunk@540709 4525493e-7705-40b1-a816-d608a930855b