free allow null ptr.

Change-Id: Id1221defb7400f49c1e1ba8b6fdf6fe142370fbe Signed-off-by: QiaoChong <qiaochong@loongson.cn>
6 years ago · a1cdd1d024
1 changed files with 1 additions and 0 deletions
--- a/lib/libc/malloc.c
+++ b/lib/libc/malloc.c
@ -112,6 +112,7 @@ void
 free(void *ap)
 {
 	HEADER *p, *q;
 	if (!ap) return;
 	p = (HEADER *) ap - 1;
 	if (p->s.ptr != p)