fixes #1386 Revert a154e54 . Some users are using VERY old drivers.

Author: harawata

src/main/java/org/apache/ibatis/executor/BaseExecutor.java

@@ -282,9 +282,7 @@ protected abstract <E> Cursor<E> doQueryCursor(MappedStatement ms, Object parame
   protected void closeStatement(Statement statement) {
     if (statement != null) {
       try {
-        if (!statement.isClosed()) {
-          statement.close();
-        }
+        statement.close();
       } catch (SQLException e) {
         // ignore
       }