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Fixing "Corrupt JPEG data: n extraneous bytes before marker" error

http://www-personal.umd.umich.edu/~dennismv/corruptjpeg.html

jdmarker.c lives in the OpenCV 3rdparty/libjpeg directory, edit out the appropriate line (search for "EXTRANEOUS"), make and install....happy days.

Edit: Hmmmm actually the above doesn't work since OpenCV is linking the installed library rather than the 3rdParty version and I can't seem to convince CMake to use the local one...ahhh well one for another day since redirecting standard err to /dev/null works just as well.

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