- Protection added in Draw(): "Cannot draw empty TMultiGraph".   The problem was reported here: https://savannah.cern.ch/bugs/index.php?43463
- Protection added in Draw(): "Cannot draw empty TMultiGraph".
  The problem was reported here: https://savannah.cern.ch/bugs/index.php?43463


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@26029 27541ba8-7e3a-0410-8455-c3a389f83636

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