added region option

applications/utilities/mesh/manipulation/createPatch/createPatch.C

@@ -516,11 +516,13 @@ void syncPoints
 
 int main(int argc, char *argv[])
 {
+#   include "addRegionOption.H"
     argList::validOptions.insert("overwrite", "");
 
 #   include "setRootCase.H"
 #   include "createTime.H"
     runTime.functionObjects().off();
+#   include "createNamedPolyMesh.H"
 
     const bool overwrite = args.optionFound("overwrite");
 
@@ -532,6 +534,11 @@ int main(int argc, char *argv[])
         (
             "createPatchDict",
             runTime.system(),
+            (
+                regionName != polyMesh::defaultRegion
+              ? regionName
+              : word::null
+            ),
             runTime,
             IOobject::MUST_READ,
             IOobject::NO_WRITE,
@@ -551,7 +558,6 @@ int main(int argc, char *argv[])
     coupledPolyPatch::matchTol = tol;
 
 
-#   include "createPolyMesh.H"
     const word oldInstance = mesh.pointsInstance();
 
     const polyBoundaryMesh& patches = mesh.boundaryMesh();