Don't change PHPMailer core just modify public charset object-var, refs #1117

Signed-off-by: Arnold Bechtoldt <mail@arnoldbechtoldt.com>

scripts/jobs/cron_autoresponder.php

@@ -226,6 +226,7 @@ if($db->num_rows($result) > 0)
 
 				$_mailerror = false;
 				try {
+					$mail->CharSet = "UTF-8";
 					$mail->SetFrom($to, $to);
 					$mail->AddReplyTo($to, $to);
 					$mail->Subject = $row['subject'];