Werk #3534: Fixed exception with upload of interlaced PNG files

Component	Setup
Title	Fixed exception with upload of interlaced PNG files
Date	May 17, 2016
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.4.0i1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.2.8p2 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

The upload of interlaced PNG files is not supported with older versions (<1.1.7) of the python PIL module.

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