ENH: multi-region support for reconstructParMesh (#2072)

applications/utilities/parallelProcessing/decomposePar/domainDecompositionWrite.C

@@ -52,7 +52,7 @@ void Foam::domainDecomposition::writeVolField
             false
         ),
         this->mesh(),
-        dimensionedScalar("cellDist", dimless, -1),
+        dimensionedScalar(dimless, Zero),
         zeroGradientFvPatchScalarField::typeName
     );