fix affected rows conversoin bug when the number of row is large

[takaidohigasi]

related issue

#29

#16 ?

how to reproduce error

execute query which affected rows is over 2 byte-integer

taka-h@127.0.0.1 [sbtest] > desc sbtest1;
+-------+-----------+------+-----+---------+----------------+
| Field | Type      | Null | Key | Default | Extra          |
+-------+-----------+------+-----+---------+----------------+
| id    | int(11)   | NO   | PRI | NULL    | auto_increment |
| c     | char(120) | NO   |     |         |                |
+-------+-----------+------+-----+---------+----------------+
4 rows in set (0.00 sec)

taka-h@127.0.0.1 [sbtest] > update sbtest1 set c='fuga' where id<100000;
Query OK, 99999 rows affected (0.24 sec)
Rows matched: 99999  Changed: 99999  Warnings: 0

Note

the type of 'affected rows' is packet-Protocol::LengthEncodedInteger, LengthEncodedInt is appropriate

refs.
https://dev.mysql.com/doc/internals/en/integer.html#packet-Protocol::LengthEncodedInteger
https://dev.mysql.com/doc/internals/en/packet-OK_Packet.html

[takaidohigasi]

@40t I'm glad if you take a look! thanks.

[40t]

thx ^_^