no curvature refinement if no different maxLevel

src/autoMesh/autoHexMesh/meshRefinement/meshRefinementRefine.C

@@ -1164,7 +1164,12 @@ Foam::labelList Foam::meshRefinement::refineCandidates
         // Refinement based on curvature of surface
         // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-        if (curvatureRefinement && (curvature >= -1 && curvature <= 1))
+        if
+        (
+            curvatureRefinement
+         && (curvature >= -1 && curvature <= 1)
+         && (surfaces_.minLevel() != surfaces_.maxLevel())
+        )
         {
             label nCurv = markSurfaceCurvatureRefinement
             (