Merge pull request reidmorrison#159 from josephfrazier/nameerror.log_to_stdout

Only undefine Rails::Server#log_to_stdout if it's defined

Author: reidmorrison

lib/rails_semantic_logger/extensions/rails/server.rb

@@ -5,7 +5,7 @@ module Rails
   class Server
     private
 
-    undef_method :log_to_stdout
+    undef_method :log_to_stdout if method_defined?(:log_to_stdout)
     def log_to_stdout
       wrapped_app # touch the app so the logger is set up