tree b7e6413290d34be2215d8e447afae33a4baf303b
parent 27ef026603319decd1b3d4d92a5d3bf21dcc2db5
author Mark Adler <madler@alumni.caltech.edu> 1441500355 -0700
committer Mark Adler <madler@alumni.caltech.edu> 1441500355 -0700

Avoid shifts of negative values inflateMark().

The C standard says that bit shifts of negative integers is
undefined.  This casts to unsigned values to assure a known
result.