Ndof for composite finite element spaces

I cannot compile the following:

mesh Th = square(10,10);
fespace Vhu(Th, [P2, P2]);
fespace Vhv(Th, [P1, P1]);
fespace Ch = Vhu*Vhv;
cout << Ch.ndof << endl;

It seems that there is no ndof of a composite finite element spaces.

.ndof for composite FE spaces is now in the develop branch ( add .ndof for composite FEspaces · FreeFem/FreeFem-sources@c37e4c0 · GitHub )