[TYPO3-core] FYI72: #15531: jumpurl check fails if mime type is not known

[Dmitry Dulepov]

Hi!

This is SVN patch request.

Type: bug

Branches: 4.3, 4.4, trunk

BT reference: http://bugs.typo3.org/view.php?id=15531

Problem: if TYPO3 cannot get mime type of the file, jumpurl checks will
fail. This happens because TYPO3 calculates hashes differently: it
serializes the mime type as null but when it checks, it expects empty
string. Obviously the check fails.

Solution: make a type cast.

-- 
Dmitry Dulepov
TYPO3 core&security team member
Twitter: http://twitter.com/dmitryd
Read more @ http://dmitry-dulepov.com/
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