John Bowler 2225ca0a54 pngvalid with 'limit' checks disabled in RC+
This widens the 'limit' check on the internally calculated error limits in the
'DIGITIZE' case (the code used prior to 1.7 for rgb_to_gray error checks) and it
changes the check to only operate in non-release builds (base build type not RC
or RELEASE.)

Signed-off-by: John Bowler <jbowler@acm.org>
2015-12-15 08:28:47 -08:00
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