Security update for djvulibre

This update for djvulibre fixes the following issues:

Security issue fixed:

- CVE-2019-18804: Fixed a null pointer dereference (bsc#1156188).

Other issue addressed:
- Fixed a crash when mmx was enabled (bsc#1154401)
This update was imported from the SUSE:SLE-15:Update update project.

Fixed bugs
bnc#1156188
VUL-1: CVE-2019-18804: djvulibre: NULL pointer dereference in the function DJVU:filter_fv at IW44EncodeCodec.cpp
bnc#1154401
libdjvulibre21 crashes in DJVU::MMXControl::enable_mmx()
Selected Binaries
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