[Bug 207849] graphics/giflib: regression in version 5.1.2

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=207849

            Bug ID: 207849
           Summary: graphics/giflib: regression in version 5.1.2
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: portmgr at FreeBSD.org
          Reporter: shoesoft at gmx.net
             Flags: maintainer-feedback?(portmgr at FreeBSD.org)
          Assignee: portmgr at FreeBSD.org

Created attachment 167928
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=167928&action=edit
patch to fix giflib-5.1.2 issues

There is a bug in giflib-5.1.2 that break some applications. I've seen errors
in konqueror and mplayer (with GIF=on).

Currently, there is no upstream fix available.

Attached is a patch that fixes the problem. The removed check look redundant -
I couldn't find a code path where Private->RunningBits would exceed that limit
after initialization. (Currently Private->RunningBits is checked before it is
initialized)

Previous discussion:
http://lists.freebsd.org/pipermail/freebsd-ports/2016-March/102367.html

Upstream ticket:
https://sourceforge.net/p/giflib/bugs/84/

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