One of the afl-fuzz tests (000003?) was failing due to the source
range being out of bounds.
Also, add assert() to the checked chk_src_range() and chk_dst_range()
functions.
Otherwise, attempting to dereference a5 will segfault.
This fixes all of the unice68 segfaults found with afl-fuzz so far...
at least in debug builds. Release builds are still faulting for some
reason...
TODO: Continue running afl-fuzz. I suspect I'll need to add something
similar to all uses of chk_src_range() and chk_dst_range().
This fixes the build of unice68.
The unice68 executable can now be built in tree for testing purposes,
but it isn't built or installed as part of the normal build.
This will be used to decompress Atari ST SNDH files.
Note that unice68 is GPLv3, so there's a compile-time option to
disable it.
TODO: Make it a DLL/SO instead and use dlopen().
