decodecorpus

[ephiepark]

Decoder was enforcing a constraint that is more strict than the spec. Sequence section for a compressed block can be less than the constraint that was enforced by decoder. When a block with rle mode for all (literal length, match length, and offset) is followed by another block with repeat mode for all (literal length, match length, and offset), the second block's sequence section can be 2 bytes (1 byte for number of sequences and 1 byte for compression mode for each field).

This pull request includes 2 changes.

1. fixing the decoder code to remove the constraint.
2. Updating decodecorpus code to generate repeat after rle mode.

Run ./decodecorpus -ptestfiles -otestfiles -n1 -s1236947365 -v to generate an input that has an issue before the fix.