[BUG] Potential memory leak in rdesktop/tcp.c:389

[rachyyyy]

Calling gnutls_certificate_allocate_credentials() in rdesktop/tcp.c:389 line 389, allocate the memory stored in &xcred without calling the pairing function gnutls_certificate_free_credentials() to free the memory will cause a memory leak.

The doc says "gnutls_certificate_free_credentials frees a gnutls_certificate_credentials_t structure."

• This bug is a security issue