re PR c++/29048 ("`x' is private" error duplicated when scope specified)

PR c++/29048
        * semantics.c (finish_qualified_id_expr): Avoid duplicate access
        check here, too.

From-SVN: r132265

gcc/testsuite/g++.dg/lookup/duperr1.C

@@ -0,0 +1,5 @@
+// PR c++/29048
+
+class A { int i; }; // { dg-bogus "is private.*is private" }
+// { dg-error "is private" "" { target *-*-* } 3 }
+class B:public A { B() { A::i=0; } }; // { dg-error "within this context" }