John Bowler cd3b0cc4d9 [devel] Fixed a problem in png_do_expand_palette() exposed by optimization in ...

1.5.3beta06
  Also removed a spurious (totally unused and confusing) member from png_info.
  The palette expand optimization prevented expansion to an intermediate RGBA
    form if tRNS was present but alpha was marked to be stripped; this exposed
    a check for tRNS in png_do_expand_palette() which is inconsistent with the
    code elsewhere in libpng.

2011-06-14 23:01:07 -05:00

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