compiling'

FlippR-Driver/src/output/OutputGPIOInterface.cpp

@@ -141,5 +141,10 @@ void OutputGPIOInterface::fire_sound(bool fire)
   GPIOInterface::write_pin(pins_sound["fire"], fire);
 }
 
+void OutputGPIOInterface::write_display(std::shared_ptr<output::items::IDisplay> display)
+{
+  return;
+}
+
 }
 }