autoPtr gets "empty()" method that can be used instead of "! ...valid()"

src/OpenFOAM/memory/Xfer/XferI.H

src/OpenFOAM/memory/autoPtr/autoPtr.H

src/OpenFOAM/memory/autoPtr/autoPtrI.H

src/OpenFOAM/memory/tmp/refCount.H

src/OpenFOAM/memory/tmp/tmp.H

src/OpenFOAM/memory/tmp/tmpI.H

...meshes/polyMesh/mapPolyMesh/mapDistribute/mapDistribute.C

...micMesh/polyTopoChange/polyTopoChange/refinementHistory.C

...opoChange/repatchPolyTopoChanger/repatchPolyTopoChanger.C

src/edgeMesh/edgeMesh.C

src/edgeMesh/edgeMeshI.H

src/edgeMesh/edgeMeshIO.C

src/finiteVolume/fvMesh/fvMeshSubset/fvMeshSubset.C

...splacement/surfaceSlipDisplacementPointPatchVectorField.C

...irectMapped/directMappedPolyPatch/directMappedPolyPatch.H

src/meshTools/searchableSurface/distributedTriSurfaceMesh.C

src/meshTools/searchableSurface/triSurfaceMesh.C

src/postProcessing/functionObjects/forces/forces/forces.C

...ostProcessing/functionObjects/minMaxFields/minMaxFields.C

src/sampling/sampledSet/sampledSets/sampledSetsTemplates.C