lv_font.h: change field order

src/lv_font/lv_font.h

@@ -76,12 +76,12 @@ typedef struct _lv_font_struct
     /*Pointer to the font in a font pack (must have the same line height)*/
     uint8_t line_height;      /**< The real line height where any text fits*/
     uint8_t base_line;        /**< Base line measured from the top of the line_height*/
+    uint8_t subpx  :2;        /**< An element of `lv_font_subpx_t`*/
     void * dsc;               /**< Store implementation specific data here*/
 #if LV_USE_USER_DATA
     lv_font_user_data_t user_data; /**< Custom user data for font. */
 #endif
 
-    uint32_t subpx  :2;      /**< An element of `lv_font_subpx_t`*/
 
 } lv_font_t;