Fix unoptimized debug build

There is a call to a function not brought
in by a use statement in the BuildFile. It
normally links because it is surrounded by
an if(0) and the optimizer removes the call.
But it fails to link in an unoptimized debug
build. I commented out the offending code
instead.
Merge pull request #5444 from wddgit/from-CMSSW_7_3_X_2014-09-19-0200

Fix unoptimized debug build