Add expected error

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@33227 138bc75d-0d04-0410-961f-82ee72b054a4

gcc/testsuite/g++.old-deja/g++.other/crash17.C

@@ -2,5 +2,5 @@
 // Origin: Dima Volodin <dvv@dvv.org>
 
 class C {
-  static int const N (1000);
+  static int const N (1000); // ERROR - invalid declaration
 };