Bug fix due to missing comment. The list of navigators should NOT be streamed

git-svn-id: http://root.cern.ch/svn/root/trunk@40942 27541ba8-7e3a-0410-8455-c3a389f83636

geom/geom/inc/TGeoManager.h

@@ -99,7 +99,7 @@ private :
    // Map of navigatorr arrays per thread
    typedef std::map<Long_t, TGeoNavigatorArray *>   NavigatorsMap_t;
    typedef NavigatorsMap_t::iterator                NavigatorsMapIt_t;
-   NavigatorsMap_t       fNavigators;       // Map between thread id's and navigator arrays
+   NavigatorsMap_t       fNavigators;       //! Map between thread id's and navigator arrays
    TGeoNavigator        *fCurrentNavigator; //! current navigator
    TGeoVolume           *fCurrentVolume;    //! current volume
    TGeoVolume           *fTopVolume;        //! top level volume in geometry