bug in barycenter wuad for tetrahedrons codim 0.

[[Imported from SVN: r812]]

fem/fastquad/facecenterpoints.hh

@@ -113,7 +113,7 @@ namespace Dune {
     enum { polynomOrder = 1 };
     static Domain getPoint (int i)
     {
-      Domain tmp = (1.0/3.0);
+      Domain tmp = (0.25);
       return tmp;
     };
     static RangeField getWeight (int i) { return (1.0/6.0); };