Ensure ttl field is a number

[jsoref]

I accidentally tried to change a ttl from 60 to 60-0:

SELECT ttl 
FROM records
                       
WHERE name = 'test.example.com' 
AND id != '115'
                       
AND domain_id = '2'
                       
AND TYPE = 'CNAME'
                       
AND ttl != '60-0'

SQLSTATE[22P02]: Invalid text representation: 7 ERROR:  invalid input syntax for integer: "60-0"
LINE 5:                        AND ttl != '60-0'
                                          ^

[edmondas]

It cannot be reproduced with the latest code.