Log Message:
jbig2dec: Update to 0.19

Changes:
0.19
----
 * API change to use full 32 bit segment numbers, in accordance
   to the JBIG2 specification.
 * Better handling of end of input data stream and and when
   encountering errors in the arithmetic decoder stream. This
   should improve many situations where jbig2dec appeared to
   run forever.
 * Fix several bugs related to signedness or over-/underflow
   checks that were not robust.
 * Bug fixes for issues reported by Coverity/OSS-fuzz.
 * Add option to limit memory usage to command line tool.
 * Update manpages, and command line tool usage.