fix spell mistake

null To NULL
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ROVAST 2019-11-06 16:41:57 +08:00 committed by GitHub
parent e0e4e68e6e
commit d123bbe279
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@ -47,7 +47,7 @@ struct single_list* del(struct single_list **prev)
if (!prev)
return NULL;
if (*prev == null)
if (*prev == NULL)
return NULL;
tmp = *prev;
*prev = (*prev)->next;