Merge pull request #108 from ekampp/master

Use instance_variable_defined? to avoid warning

Author: davidcelis

lib/api-pagination/configuration.rb

@@ -50,7 +50,11 @@ def initialize
     end
 
     def paginator
-      @paginator || set_paginator
+      if instance_variable_defined? :@paginator
+        @paginator
+      else
+        set_paginator
+      end
     end
 
     def paginator=(paginator)