Minor whitespace fix.

include/SDL_joystick.h

@@ -258,11 +258,10 @@ extern DECLSPEC Uint8 SDLCALL SDL_JoystickGetButton(SDL_Joystick * joystick,
 extern DECLSPEC void SDLCALL SDL_JoystickClose(SDL_Joystick * joystick);
 
 /**
-*  Return the battery level of this joystick
-*/
+ *  Return the battery level of this joystick
+ */
 extern DECLSPEC SDL_JoystickPowerLevel SDLCALL SDL_JoystickCurrentPowerLevel(SDL_Joystick * joystick);
 
-
 /* Ends C function definitions when using C++ */
 #ifdef __cplusplus
 }