Fix previous fix

[[Imported from SVN: r9192]]

dune/gfe/hyperbolichalfspacepoint.hh

@@ -387,7 +387,7 @@ public:
                 
                     } else if (i==N-1 and j==N-1 and k==N-1) {
                     
-                        dFdqdqdq[i][j][k] = (2.0*p[N-1] -1 -4*p[N-1] -3*diffNormSquared)/(p[N-1]*Dune::Power<3>::eval(q[N-1])); 
+                        dFdqdqdq[i][j][k] = (-1 -6*p[N-1] + 4*q[N-1] -3*diffNormSquared)/(p[N-1]*Dune::Power<3>::eval(q[N-1])); 
                 
                     }