New test case.

From-SVN: r23214

gcc/testsuite/g++.old-deja/g++.martin/lookup1.C

@@ -0,0 +1,22 @@
+//Build don't link:
+//In the base class list, the context of the current is used
+//reported by Stephen Vavasis <vavasis@CS.Cornell.EDU>
+
+namespace N1 {
+  namespace N2 {
+    class A{};
+    class B;
+  }
+}
+
+class N1::N2::B : public A {
+};
+
+
+class C1 {
+    class A{};
+    class B;
+};
+
+class C1::B : A {
+};