r287541 | dim | 2015-09-07 20:55:14 +0000 (Mon, 07 Sep 2015) | 7 lines

  In libz's inflateMark(), avoid left-shifting a negative integer, which
  is undefined.

  Reviewed by:    delphij
  Differential Revision: https://reviews.freebsd.org/D3344
  MFC after:      3 days