geelen/x-gif — pull request #18 by soranoba (2014-06-14 04:06:48+00:00)
Title: App ext block size fix feature

Application header that has been extended by Netscape are sometimes used in animation gif.
(ex. when it made from mp4 using ffmpeg)
However, if there is this header, the x-gif was not available.

I fix this =)