/**
 * \ function RemoveGeoManager
 * There are some problems when deleting our geometries. In some cases
 * or combinations of geometries there is a double free of some memory 
 * which results in a crash of ROOT. To avoid this we have patched one
 * ROOT class. With the newest ROOT6 version this isn't done any longer.
 * As a workaround to avoid the crash we delete two TObjArrays ourself 
 * and then call the destructor of the TGeoManager at the end of the 
 * macro. To simplify this one also can use this function.
 */
void RemoveGeoManager()
{
  if (gROOT->GetVersionInt() >= 60602) {
    gGeoManager->GetListOfVolumes()->Delete();
    gGeoManager->GetListOfShapes()->Delete();
    delete gGeoManager;
  }
}