ENH: CleanFunctions: remove level 0 length file

bin/tools/CleanFunctions

@@ -2,7 +2,7 @@
 # =========                 |
 # \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
 #  \\    /   O peration     |
-#   \\  /    A nd           | Copyright (C) 2011 OpenFOAM Foundation
+#   \\  /    A nd           | Copyright (C) 2011-2012 OpenFOAM Foundation
 #    \\/     M anipulation  |
 #------------------------------------------------------------------------------
 # License
@@ -88,7 +88,7 @@ cleanCase()
             rm -rf \
             allOwner* cell* face* meshModifiers* \
             owner* neighbour* point* edge* \
-            cellLevel* pointLevel* refinementHistory* surfaceIndex* sets \
+            cellLevel* pointLevel* refinementHistory* level0Edge surfaceIndex* sets \
             > /dev/null 2>&1 \
         )
     fi