minor fixes

lv_core/lv_vdb.c

@@ -3,16 +3,15 @@
  *
  */
 
+/*********************
+ *      INCLUDES
+ *********************/
 #include "lv_vdb.h"
 #if LV_VDB_SIZE != 0
 
 #include "../lv_hal/lv_hal_disp.h"
 #include <stddef.h>
 
-/*********************
- *      INCLUDES
- *********************/
-
 /*********************
  *      DEFINES
  *********************/
@@ -34,7 +33,6 @@ typedef enum {
  *  STATIC VARIABLES
  **********************/
 
-
 #if LV_VDB_DOUBLE == 0
 /*Simple VDB*/
 static volatile lv_vdb_state_t vdb_state = LV_VDB_STATE_ACTIVE;

lv_core/lv_vdb.h

@@ -28,6 +28,10 @@ extern "C" {
  *      DEFINES
  *********************/
 
+#ifndef LV_VDB_PX_BPP
+#warning "LV_VDB_PX_BPP is not specified in lv_conf.h. Use the default value (LV_COLOR_SIZE)"
+#define LV_VDB_PX_BPP LV_COLOR_SIZE
+#endif
 /**********************
  *      TYPEDEFS
  **********************/