[mythtv-commits] [MythTV/mythtv] 5acba1: bitreader.h: get_upper_bits() make undefined behav...

[Scott Theisen]

  Branch: refs/heads/master
  Home:   https://github.com/MythTV/mythtv
  Commit: 5acba1b09ff8dd955ee708522aa67c2bada335c9
      https://github.com/MythTV/mythtv/commit/5acba1b09ff8dd955ee708522aa67c2bada335c9
  Author: Scott Theisen <scott.the.elm at gmail.com>
  Date:   2022-07-29 (Fri, 29 Jul 2022)

  Changed paths:
    M mythtv/libs/libmythtv/bitreader.h

  Log Message:
  -----------
  bitreader.h: get_upper_bits() make undefined behavior protection consistent

If bits == 0, which should never occur, we want the top 0 bits.
Return 0, as would be expected from shifting in 64 `0` bits.
Also, mask_upper(0) returns 0, which would clear all the bits anyways.