From Fabrizio:

- Correctly honor the create/recreate options coming from TFile::Open().
- Allow the size of the (written) file to be retrieved after the Close
  (solves several reported file size mismatches).


git-svn-id: http://root.cern.ch/svn/root/trunk@23819 27541ba8-7e3a-0410-8455-c3a389f83636