Fixed SDL_pen.h for SDL3 bit flag conventions

include/SDL3/SDL_pen.h

@@ -66,13 +66,14 @@ typedef Uint32 SDL_PenID;
  * \since This datatype is available since SDL 3.0.0.
  */
 typedef Uint32 SDL_PenInputFlags;
-#define SDL_PEN_INPUT_DOWN       (1u << 0)  /**< & to see if pen is pressed down */
-#define SDL_PEN_INPUT_BUTTON_1   (1u << 1)  /**< & to see if button 1 is pressed */
-#define SDL_PEN_INPUT_BUTTON_2   (1u << 2)  /**< & to see if button 2 is pressed */
-#define SDL_PEN_INPUT_BUTTON_3   (1u << 3)  /**< & to see if button 3 is pressed */
-#define SDL_PEN_INPUT_BUTTON_4   (1u << 4)  /**< & to see if button 4 is pressed */
-#define SDL_PEN_INPUT_BUTTON_5   (1u << 5)  /**< & to see if button 5 is pressed */
-#define SDL_PEN_INPUT_ERASER_TIP (1u << 30) /**< & to see if eraser tip is used */
+
+#define SDL_PEN_INPUT_DOWN       (1u << 0)  /**< pen is pressed down */
+#define SDL_PEN_INPUT_BUTTON_1   (1u << 1)  /**< button 1 is pressed */
+#define SDL_PEN_INPUT_BUTTON_2   (1u << 2)  /**< button 2 is pressed */
+#define SDL_PEN_INPUT_BUTTON_3   (1u << 3)  /**< button 3 is pressed */
+#define SDL_PEN_INPUT_BUTTON_4   (1u << 4)  /**< button 4 is pressed */
+#define SDL_PEN_INPUT_BUTTON_5   (1u << 5)  /**< button 5 is pressed */
+#define SDL_PEN_INPUT_ERASER_TIP (1u << 30) /**< eraser tip is used */
 
 /**
  * Pen axis indices.