C++11: Allow brace-init-list in range-for statement.

Also drop the unused 'initializer' member from
RangeBasedForStatementAST.

Change-Id: I078ebbc85cafa643af4bfe62d698bf7de71360e4
Reviewed-by: hjk <qthjk@ovi.com>

src/libs/3rdparty/cplusplus/ASTVisit.cpp

@@ -493,7 +493,6 @@ void RangeBasedForStatementAST::accept0(ASTVisitor *visitor)
     if (visitor->visit(this)) {
         accept(type_specifier_list, visitor);
         accept(declarator, visitor);
-        accept(initializer, visitor);
         accept(expression, visitor);
         accept(statement, visitor);
     }