from preamble:

"Change Set:		GifReadWriterDecodingIssues-klc-1
Date:			26 January 2004
Author:			Ken Causey

It seems that someone started some changes to handle comment blocks in
GIF files but never finshed it.  The code was completely unused and
buggy (the block terminator was not being processed) and there was no
way to tell what the goal of it was, so I removed it.  This fixes a
problem with reading GIF files with comments."!
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