Rename NUL to null in x509 IP parsing description
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
diff --git a/include/mbedtls/x509.h b/include/mbedtls/x509.h
index 6e9ee88..b7da185 100644
--- a/include/mbedtls/x509.h
+++ b/include/mbedtls/x509.h
@@ -503,7 +503,7 @@
/**
* \brief This function parses a CN string as an IP address.
*
- * \param cn The CN string to parse. CN string MUST be NUL-terminated.
+ * \param cn The CN string to parse. CN string MUST be null-terminated.
* \param dst The target buffer to populate with the binary IP address.
* The buffer MUST be 16 bytes to save IPv6, and should be
* 4-byte aligned if the result will be used as struct in_addr.