解决log日志长度可能越界的问题

Signed-off-by: huhui <huhui@sharkgulf.com>

Applications/foc/mc_error.c

@@ -84,7 +84,7 @@ void mc_err_block_save(void) {
 }
 
 int mc_crit_err_get(s16 offset, u8 *buff, int len) {
-	int count = len / sizeof(err_node_t);
+	int count = (len - 1) / sizeof(err_node_t);
 	int index = offset;
 	u8 *p_remain = buff++;
 	if (_e_nv->count == ERR_MAX_SIZE) {
@@ -109,7 +109,7 @@ int mc_crit_err_get(s16 offset, u8 *buff, int len) {
 
 
 int mc_err_runtime_get(s16 offset, u8 *buff, int len) {
-	int count = len / sizeof(runtime_node_t);
+	int count = (len - 1) / sizeof(runtime_node_t);
 	int index = offset;
 	u8 *p_remain = buff++;
 	if (_r_nv->count == RUNTIME_MAX_SIZE) {