updae source to 2.0.9 source

Edward Rudd

2019-04-09 9cd2e9ec8fc0127393dfce9c0359d500c8c238be

 source/test/testjoystick.c

@@ -90,6 +90,10 @@
            case SDL_JOYBUTTONDOWN:
                SDL_Log("Joystick %d button %d down\n",
                       event.jbutton.which, event.jbutton.button);
                /* First button triggers a 0.5 second full strength rumble */
                if (event.jbutton.button == 0) {
                    SDL_JoystickRumble(joystick, 0xFFFF, 0xFFFF, 500);
                }
                break;
            case SDL_JOYBUTTONUP:
                SDL_Log("Joystick %d button %d up\n",