Comment 1 for bug 1238673

Trying to fix in repository.
The problem is that exiv2 does not report consistent strings. For Canon cameras it can contain (65535) or (0) for unknown lenses. For Pentax cams it reports the string "Unknown (0xVAL)". I found this 3 values in a quick test and added it to Hugin to ignore it.
If you found further inconsistencies, please report, so we can add them also.