secur32: Don't use deprected gnutls_certificate_credentials.

[Jacek Caban]

This causes compile warnings with recent gnutls and is probably worth
fixing before release. I checked history of gnutls and its *_t variant
was introduced by:

http://git.savannah.gnu.org/gitweb/?p=gnutls.git;a=commitdiff;h=933c12dd1b0b7af1e6b0d9de9a5037d0990d2be0

which is version 1.1.11. Our configure checks for
gnutls_mac_get_key_size, which was introduced by:

http://git.savannah.gnu.org/gitweb/?p=gnutls.git;a=commitdiff;h=fea2e842cf383e62f08b782bc1962659fba86712

so we require gnutls 2.1.2 anyway. This means that there is no
compatibility risk.

---
 dlls/secur32/schannel_gnutls.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)


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