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/cplusplus/FindUsages.cpp

@@ -1025,7 +1025,6 @@ bool FindUsages::visit(RangeBasedForStatementAST *ast)
         this->specifier(it->value);
     }
     this->declarator(ast->declarator);
-    this->expression(ast->initializer);
     // unsigned comma_token = ast->comma_token;
     this->expression(ast->expression);
     // unsigned rparen_token = ast->rparen_token;