[Bug 204421] [patch] [maintainer-update] graphics/pngcrush: update to 1.7.87

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=204421

            Bug ID: 204421
           Summary: [patch] [maintainer-update] graphics/pngcrush: update
                    to 1.7.87
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Keywords: patch
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: freebsd-ports-bugs at FreeBSD.org
          Reporter: vsasjason at gmail.com
 Attachment #162950 maintainer-approval+
             Flags:
             Flags: maintainer-feedback+
          Keywords: patch

Created attachment 162950
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=162950&action=edit
patch for update

*  Fixed a double-free bug. There was a "free" of the sPLT chunk structure
    in pngcrush and then again in png.c (Bug report by Brian Carpenter).
*  Added common-law trademark notice and export control information.
*  Rearranged some paragraphs in the comments at the beginning of pngcrush.c
*  Increased some buffer sizes in an attempt  to prevent possible overflows.

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