bug fix for Quad with poly ord = 2 .

[[Imported from SVN: r2803]]

quadrature/fixedorder/gaussquadimp.hh

@@ -14,6 +14,7 @@ namespace Dune {
   };
 
   // specialization for the given order
+  template <> struct PointsOnLine <2>  { enum { points = 2 }; };
   template <> struct PointsOnLine <3>  { enum { points = 2 }; };
   template <> struct PointsOnLine <4>  { enum { points = 3 }; };
   template <> struct PointsOnLine <5>  { enum { points = 3 }; };