mpg123: updated to 1.25.7

1.25.7
------
- mpg123:
-- Do not play with cursor and inverse video for progress bar
  when TERM=dumb.
-- Fix parsing of host port for numerical IPv6 addresses (just did
  not work before, only for textual host names).
- libmpg123:
-- Proper fix for the xrpnt overflow problems by correctly
  initialising certain tables for MPEG 2.x layer III. The checks that
  catch the resulting overflow are still in place, but likely superfluous
  now. Note that this means certain valid files would have been misdecoded
  before, if anyone actually produced them. Thanks to Robert Hegemann for
  the fix!
-- Silently handle granules with part2_3_length == 0, but
  scalefac_compress != 0 (ignore the latter).

(adam)