polyMesh: Changed topoChanging -> topoChanged

The topoChanged flag now indicates that the mesh topology has changed at the
start of the current time-step rather than it is changing during the run, for
subsequent time-steps without topology change it is set false until the next
topology change.

applications/test/hexRef8/Test-hexRef8.C

@@ -192,7 +192,7 @@ int main(int argc, char *argv[])
 
 
         mesh.moving(false);
-        mesh.topoChanging(false);
+        mesh.topoChanged(false);
 
 
         label action = rndGen.sampleAB<label>(0, 6);
@@ -293,7 +293,7 @@ int main(int argc, char *argv[])
 
 
         Info<< nl<< "-- Mesh : moving:" << mesh.moving()
-            << " topoChanging:" << mesh.topoChanging()
+            << " topoChanged:" << mesh.topoChanged()
             << " changing:" << mesh.changing()
             << endl;