search.c (lookup_base_r): Don't clear is_non_public just because we found a friendly scope.

        * search.c (lookup_base_r): Don't clear is_non_public just because
        we found a friendly scope.

From-SVN: r50143

gcc/testsuite/g++.dg/inherit/access2.C

+// Test that a base doesn't get special rights to convert to itself.
+
+struct A {
+  void f ();
+};
+
+struct B: private A { };
+
+B b;
+
+void A::f ()
+{
+  A* ap = &b;			// { dg-error "base|inherit" "" }
+}