fix code snippets

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@1243 fdac6126-5c0c-442c-9429-916003d36597

Doc/tutorial_07.docu

@@ -17,7 +17,6 @@ data and the functions in the vertex itself
 \dontinclude 07-traits/smooth.cc
 \skipline MyTraits
 \until };
-\until };
 
 Note the definition of the vertex entity. We use the supplied define
 \c VertexTraits (which resolves in a rather inconvenient template
@@ -29,11 +28,11 @@ the get/set-method pair to access the new member.
 As before we compute in a first loop the barycenters for all vertices
 and store the information at the vertices
 
-\skipline mesh.data(v_it).set_cog
+\skipline mesh.data(*v_it).set_cog
 
 In the second pass we set the new position of each vertex
 
-\skipline mesh.data(v_it).cog
+\skipline mesh.data(*v_it).cog
 
 It looks neat, but on the other hand we can't remove the data anymore
 as we could do with properties!  By using traits one creates a 'static'