GeometricField: Temporary fields are no longer registered on the database by default

Registration occurs when the temporary field is transferred to a non-temporary
field via a constructor or if explicitly transferred to the database via the
regIOobject "store" methods.

src/functionObjects/field/streamFunction/streamFunction.C

@@ -82,7 +82,7 @@ Foam::tmp<Foam::pointScalarField> Foam::functionObjects::streamFunction::calc
                 mesh_
             ),
             pMesh,
-            dimensionedScalar("zero", phi.dimensions(), 0)
+            dimensionedScalar(phi.dimensions(), 0)
         )
     );
     pointScalarField& streamFunction = tstreamFunction.ref();