Include lv_conf.h in lv_area.h

src/lv_misc/lv_area.h

@@ -16,6 +16,11 @@ extern "C" {
 #include <string.h>
 #include <stdbool.h>
 #include <stdint.h>
+#ifdef LV_CONF_INCLUDE_SIMPLE
+#include "lv_conf.h"
+#else
+#include "../../../lv_conf.h"
+#endif
 
 /*********************
  *      DEFINES