Added vi style for the Emscripten joystick code

src/joystick/emscripten/SDL_sysjoystick.c

@@ -404,3 +404,5 @@ SDL_JoystickDriver SDL_EMSCRIPTEN_JoystickDriver =
 };
 
 #endif /* SDL_JOYSTICK_EMSCRIPTEN */
+
+/* vi: set ts=4 sw=4 expandtab: */