Eric Fischer 32929413ff Avoid a crash trying to get a substring whose start is after its end.
Constrain the start of the extracted text, not just the end, to the length
of the content.

Approver: ryanpc
Bug: 2323813
2009-12-14 17:35:36 -08:00
..
2009-12-02 13:42:48 -08:00