parser.c (cp_parser_postfix_expression): Set idk properly for object->scope::member.

        * parser.c (cp_parser_postfix_expression): Set idk properly for
        object->scope::member.

From-SVN: r62784

gcc/testsuite/g++.dg/overload/virtual1.C

+// Test that explicit scope suprresses virtual lookup even after an
+// explicit object.
+
+extern "C" int printf (const char *, ...);
+
+struct A
+{
+  virtual int f () { return 0; }
+};
+
+struct B: public A
+{
+  int f () { return 1; }
+  int g() { return this->A::f(); }
+};
+
+int main()
+{
+  B b;
+  return b.g();
+}