allow specifying NULL buffer in gnutls_x509_crt_get_*_unique_id()

diff --git a/lib/x509/x509.c b/lib/x509/x509.c
index cfc8ee1649fb9be9d175f131912661391c093ce5..d7cabdec42842e9b65abacbc14cdc7b04d807dd8 100644 (file)
--- a/lib/x509/x509.c
+++ b/lib/x509/x509.c
@@ -3464,7 +3464,6 @@ gnutls_x509_crt_get_subject_unique_id(gnutls_x509_crt_t crt, char *buf,
 
        if (datum.size > *buf_size) {   /* then we're not going to fit */
                *buf_size = datum.size;
-               buf[0] = '\0';
                result = GNUTLS_E_SHORT_MEMORY_BUFFER;
        } else {
                *buf_size = datum.size;
@@ -3508,7 +3507,6 @@ gnutls_x509_crt_get_issuer_unique_id(gnutls_x509_crt_t crt, char *buf,
 
        if (datum.size > *buf_size) {   /* then we're not going to fit */
                *buf_size = datum.size;
-               buf[0] = '\0';
                result = GNUTLS_E_SHORT_MEMORY_BUFFER;
        } else {
                *buf_size = datum.size;