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David Jones
03b4f23235
When reading the next code in a stream, avoid reading an extra byte if
we're going to throw it away. When there's no more bits to extract from
the stream, bits will be 0 and we'll mask the read byte with 0 anyway.
At worst, this will avoid reading one past the end of gbuf array (which
is not possible in well formed streams).
PR: 127912
Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D47041
(cherry picked from commit 818c7b769a)