fix ber_bvreplace() in case dst is NULL and src is empty

diff --git a/libraries/liblber/memory.c b/libraries/liblber/memory.c
index f45ec52b68d8d6968d6e2a4d94b90d795f8cb134..614305c9ed243dd2fcc78e0c1f5aacd1f6541995 100644 (file)
--- a/libraries/liblber/memory.c
+++ b/libraries/liblber/memory.c
@@ -701,7 +701,7 @@ ber_bvreplace_x( struct berval *dst, LDAP_CONST struct berval *src, void *ctx )
 {
        assert( dst != NULL );
 
-       if ( dst->bv_len < src->bv_len ) {
+       if ( dst->bv_len == 0 || dst->bv_len < src->bv_len ) {
                dst->bv_val = ber_memrealloc_x( dst->bv_val, src->bv_len + 1, ctx );
        }