From 236d0328c0ad46236a7d72e47940ce6e642b90db Mon Sep 17 00:00:00 2001
From: lixianjing <xianjimli@hotmail.com>
Date: Fri, 10 Jul 2020 06:50:55 -0700
Subject: [PATCH] improve lcd destroy

---
 src/lcd/lcd_mem.inc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/lcd/lcd_mem.inc b/src/lcd/lcd_mem.inc
index 1e20404fc..490fe886a 100644
--- a/src/lcd/lcd_mem.inc
+++ b/src/lcd/lcd_mem.inc
@@ -308,6 +308,7 @@ static ret_t lcd_mem_end_frame(lcd_t* lcd) {
 
 static ret_t lcd_mem_destroy(lcd_t* lcd) {
   lcd_mem_t* mem = (lcd_mem_t*)lcd;
+  return_value_if_fail(lcd->begin_frame != NULL, RET_BAD_PARAMS);
 
   if (mem->vgcanvas != NULL) {
     vgcanvas_destroy(mem->vgcanvas);
@@ -321,6 +322,7 @@ static ret_t lcd_mem_destroy(lcd_t* lcd) {
   graphic_buffer_destroy(mem->online_gb);
   graphic_buffer_destroy(mem->offline_gb);
 
+  memset(lcd, 0x00, sizeof(lcd_mem_t));
   TKMEM_FREE(lcd);
 
   return RET_OK;