Set the player index of an opened joystick.
the SDL_Joystick obtained from SDL_OpenJoystick().
player index to assign to this joystick, or -1 to clear the player index and turn off player LEDs.
true on success or false on failure; call SDL_GetError() for more information.
SDL_GetJoystickPlayerIndex
See Implementation
Set the player index of an opened joystick.