lib/riemann/babbler/plugins/net.rb in riemann-babbler-0.1.4 vs lib/riemann/babbler/plugins/net.rb in riemann-babbler-0.1.5

@@ -39,10 +39,10 @@
         ).each do |service, value|
           status.merge!({service => value})
         end
       end
     end
-    status.each_key { |key| @diff[key] = status[key] - @old_status[key] } if @old_status
+    status.each_key { |key| @diff[key] = status[key] - @old_status[key] } unless @old_status.empty?
     @old_status = status
     @diff
   end
 
   def tick