EllisLab/CodeIgniter — pull request #1576 by Dumk0 (2012-07-05 00:16:38+00:00)
Title: improvement for latest migration id calculation

It is better to use
```
(int)$last_migration
```
instead of
```
(int)substr($last_migration, 0, 3)
```

result is the same but in first case there is no limits for length of number part, who knows how big it can be.