ORA-00911: invalid character

SELECT u.id, u.firstname, u.lastname, u.picture, u.imagealt, u.lastaccess, count(m.id) as messagecount FROM mlmessage_contacts mc JOIN mluser u ON u.id = mc.contactid LEFT OUTER JOIN mlmessage m ON m.useridfrom = mc.contactid AND m.useridto = 85 WHERE mc.userid = 85 AND mc.blocked = 0 GROUP BY u.id, u.firstname, u.lastname, u.picture, u.imagealt, u.lastaccess ORDER BY u.firstname ASC;

• line 686 of lib/dmllib.php: call to debugging()
• line 56 of message/lib.php: call to get_recordset_sql()
• line 87 of message/index.php: call to message_print_contacts()

ORA-00911: invalid character

SELECT u.id, u.firstname, u.lastname, u.picture, u.imagealt, u.lastaccess, count(m.id) as messagecount FROM mlmessage m JOIN mluser u ON u.id = m.useridfrom LEFT OUTER JOIN mlmessage_contacts mc ON mc.contactid = m.useridfrom AND mc.userid = m.useridto WHERE mc.id IS NULL AND m.useridto = 85 GROUP BY u.id, u.firstname, u.lastname, u.picture, u.imagealt, u.lastaccess ORDER BY u.firstname ASC;

• line 686 of lib/dmllib.php: call to debugging()
• line 88 of message/lib.php: call to get_recordset_sql()
• line 87 of message/index.php: call to message_print_contacts()

To solve it it's necessary to delete the semicolon at the end of the following SQL sentences in the message/lib.php file:

message/lib.php (line 52)
$contactsql = "SELECT u.id, u.firstname, u.lastname, u.picture,
u.imagealt, u.lastaccess, count(m.id) as messagecount
FROM {$CFG->prefix}message_contacts mc
JOIN {$CFG->prefix}user u
ON u.id = mc.contactid
LEFT OUTER JOIN {$CFG->prefix}message m
ON m.useridfrom = mc.contactid
AND m.useridto = {$USER->id}
WHERE mc.userid = {$USER->id}
AND mc.blocked = 0
GROUP BY u.id, u.firstname, u.lastname, u.picture,
u.imagealt, u.lastaccess
ORDER BY u.firstname ASC";

message/lib.php (line 83)
$strangersql = "SELECT u.id, u.firstname, u.lastname, u.picture,
u.imagealt, u.lastaccess, count(m.id) as messagecount
FROM {$CFG->prefix}message m
JOIN {$CFG->prefix}user u
ON u.id = m.useridfrom
LEFT OUTER JOIN {$CFG->prefix}message_contacts mc
ON mc.contactid = m.useridfrom AND
mc.userid = m.useridto
WHERE mc.id IS NULL AND m.useridto = {$USER->id}
GROUP BY u.id, u.firstname, u.lastname, u.picture,
u.imagealt, u.lastaccess
ORDER BY u.firstname ASC";