range.c: force hash values fixable

* range.c (range_hash): force hash values fixable on LLP64
  environment.  [ruby-core:92194] [Bug #15757]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67468 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

range.c

@@ -230,7 +230,7 @@ range_hash(VALUE range)
     hash = rb_hash_uint(hash, EXCL(range) << 24);
     hash = rb_hash_end(hash);
 
-    return LONG2FIX(hash);
+    return ST2FIX(hash);
 }
 
 static void

test/ruby/test_range.rb

@@ -203,6 +203,7 @@ class TestRange < Test::Unit::TestCase
     assert_not_equal((0..1).hash, (0...1).hash)
     assert_equal((0..nil).hash, (0..nil).hash)
     assert_not_equal((0..nil).hash, (0...nil).hash)
+    assert_kind_of(String, (0..1).hash.to_s)
   end
 
   def test_step