One-bit bitfields should probably be unsigned. Unfortunately, it is left
up to the compiler on how one bit fields are treated. gcc treats one-bit
bitfields as signed and allows for the -funsigned-field parameter. Other
compilers (like Sun C) treat one-bit bitfields as unsigned no matter what.
Patch by Erik Hovland erik hovland org
Originally committed as revision 14131 to svn://svn.ffmpeg.org/ffmpeg/trunk