fix Issue 1570 - Wrong return for address operator

class.dd

@@ -113,10 +113,20 @@ Foo var;
 <h3>Fields</h3>
 
         $(P Class members are always accessed with the . operator.
-        There are no :: or -&gt;
-        operators as in C++.
         )
 
+	$(P Members of a base class can be accessed by prepending the name of
+	the base class followed by a dot:)
+
+---
+class A { int a; }
+class B : A { int a; }
+
+void foo(B b) {
+  b.a = 3;   // accesses field B.a
+  b.A.a = 4; // accesses field A.a
+---
+
         $(P The D compiler is free to rearrange the order of fields in a class to
         optimally pack them in an implementation-defined manner.
         Consider the fields much like the local