update() now handled case correctly when a player hasn't participated in a session

* when a player has no results, deviation is slightly increased properly now

rb/test_glicko2.rb

@@ -1,6 +1,6 @@
-#!/usr/bin/env ruby
+#!/usr/bin/env ruby -w
 
-require 'glicko2'
+require_relative 'glicko2'
 require 'test/unit'
 
 class TestGlicko2 < Test::Unit::TestCase
@@ -26,7 +26,7 @@ class TestGlicko2 < Test::Unit::TestCase
     a.update()
 
     assert_in_delta(1464.05,a.rating,0.01)
-    assert_in_delta(151.516,a.deviation,0.01)
+    assert_in_delta(151.875,a.deviation,0.01)
 
   end