* numeric.c (rb_num2long): Don't use SIGNED_VALUE uselessly.
  (check_int): Ditto.
  (check_short): Ditto.
  (rb_num2fix): Ditto.
  (rb_num2ulong_internal): Add a cast.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40035 b2dd03c8-39d4-4d8f-98ff-823fe69b080e