Document return value for IV size getter on NULL
@@ -515,6 +515,7 @@ static inline const char *mbedtls_cipher_info_get_name(
*
* \return The recommended IV size.
* \return \c 0 for ciphers not using an IV or a nonce.
+ * \return \c 0 if \p info is \c NULL.
*/
static inline size_t mbedtls_cipher_info_get_iv_size(
const mbedtls_cipher_info_t *info )
