Ruby

• ext/zlib/zlib.c (rb_gzfile_set_mtime): Use NUM2UINT.
  The old logic doesn't work well on LP64 platforms as:
  .. -263-1 => error,
  -263 .. -262-1 => success,
  -262 .. -231-1 => error,
  -231 .. 231-1 => success,
  231 .. 262-1 => error,
  262 .. 264-1 => success,
  264 .. => error.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40040 b2dd03c8-39d4-4d8f-98ff-823fe69b080e