[PATCH v9 01/15] Do not duplicate NULL in xstrdup

[Nikolay Marchuk]

---
 xmalloc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/xmalloc.c b/xmalloc.c
index 45ff57b1..b77f6910 100644
--- a/xmalloc.c
+++ b/xmalloc.c
@@ -91,6 +91,9 @@ xreallocarray(void *ptr, size_t nmemb, size_t size)
 char *
 xstrdup(const char *str)
 {
+	if (!str)
+		return NULL;
+
 	char *p = strdup(str);
 
 	if (!p)
-- 
2.11.0