Jonas Jenwald 374d074f6e Add stricter validation in Catalog.readPageLabels
The current PageLabel dictionary validation code won't catch some (unlikely) forms of corruption. For example: a `Type`/`S` entry being `null`/`0`/empty string, a `P`/`St` entry being `null`/`0`.

Please note: I'm not aware of any bugs caused by the old code, but I've had this patch sitting locally for some time and figured it couldn't hurt to submit it.
2018-03-21 14:36:05 +01:00
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2018-01-23 17:04:07 +02:00
2017-07-07 09:40:24 -05:00