refactoring enum declaration

lv_misc/lv_log.h

@@ -29,14 +29,15 @@ extern "C" {
  **********************/
 
 /*Possible log level. For compatibility declare it independently from `USE_LV_LOG`*/
-typedef enum
+enum
 {
 	LV_LOG_LEVEL_TRACE,		/*A lot of logs to give detailed information*/
 	LV_LOG_LEVEL_INFO,		/*Log important events*/
 	LV_LOG_LEVEL_WARN,		/*Log if something unwanted happened but didn't caused problem*/
 	LV_LOG_LEVEL_ERROR,		/*Only critical issue, when the system may fail*/
 	_LV_LOG_LEVEL_NUM
-}lv_log_level_t;
+};
+typedef uint8_t lv_log_level_t;
 
 #if USE_LV_LOG