Open-Xchange: null dereference in `sieve_address_do_validate` (or redundant null check)

Function sieveaddressdovalidate in file sieve-address.c does dereference errorr if address == NULL errorr = "null address"; return FALSE; and then later checks for it being NULL : if errorr != NULL errorr = strcctx.error; So either, there is a first null check missing Or the later ones are...