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Eirik Aavitsland 33ebe60098 PNG image handler: Avoid "invalid distance too far back" error 
For certain slightly miscoded png images, newer versions of libpng
will trigger the mentioned zlib error and fail to read the image. This
miscoding has until now been safely ignored by all png
implementations, so such images exist in the wild, and users expect
them to work. Since the cost of the workaround is only a missed
opportunity of a tiny saving in memory usage during decoding, enable
it.

Task-number: QTBUG-58171
Change-Id: I820a9faef6d5b7af79c04404ebdceb48a096f29a
Reviewed-by: André Klitzing <aklitzing@gmail.com>
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
 		2017-01-31 14:34:39 +00:00
..
3rdparty fix parallel builds with -qt-freetype -system-libpng 2017-01-19 21:47:59 +00:00
android Optimize QtActivity's onCreate a little bit 2016-12-25 04:14:58 +00:00
angle Fix unneeded recompiles of glslang_tab.cpp 2017-01-16 15:20:27 +00:00
concurrent QtConcurrent: Add missing override 2016-11-29 20:37:54 +00:00
corelib Doc: Normalize \since usage 2017-01-31 08:59:50 +00:00
dbus Merge remote-tracking branch 'origin/5.8.0' into 5.8 2017-01-14 22:02:55 +01:00
gui PNG image handler: Avoid "invalid distance too far back" error 2017-01-31 14:34:39 +00:00
network Doc: Normalize \since usage 2017-01-31 08:59:50 +00:00
opengl Add missing override into Qt modules 2016-12-01 12:07:13 +00:00
openglextensions Also release winmain, qopenglextensions under commercial licenses 2016-11-18 16:19:56 +00:00
platformheaders Doc: corrected qdoc syntax parameter description 2017-01-09 15:30:17 +00:00
platformsupport Merge remote-tracking branch 'origin/5.8.0' into 5.8 2017-01-25 22:39:42 +01:00
plugins XCB QPA: Fix QScreen::grabWindow(0) to return the current screen 2017-01-26 10:36:38 +00:00
printsupport Fix printsupport dependencies 2017-01-26 13:51:54 +00:00
sql configure: make library sources fail more verbosely 2016-12-30 10:25:38 +00:00
testlib Improve QTest::qWait() precision and switch to QDeadlineTimer 2017-01-25 16:40:57 +00:00
tools Silence implicit-fallthough warnings 2016-12-19 09:35:57 +00:00
widgets Doc: Normalize \since usage 2017-01-31 08:59:50 +00:00
winmain Also release winmain, qopenglextensions under commercial licenses 2016-11-18 16:19:56 +00:00
xml QXmlAttributes: mark as shared-come-qt6 2016-10-04 06:25:54 +00:00
src.pro Add a feature for Qt Xml 2017-01-06 17:19:13 +00:00