John Bowler dff6f4c4f0 [libpng16Cleanup of png_set_filler(). This function does very different things ...

on read and write.  In libpng 1.6 the two cases can be distinguished and
considerable code cleanup, and extra error checking, is possible.  This
makes calls on the write side that have no effect be ignored with a
png_app_error(), which can be disabled in the app using
png_set_benign_errors(), and removes the spurious use of usr_channels
on the read side.

2012-08-09 21:17:56 -05:00

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