url.c: Use CURLAUTH_NONE constant rather than 0

Small follow up to commit 898808fa8c to use auth constants rather than
hard code value when clearing picked authentication mechanism.

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/url.c b/lib/url.c
index 89c3fd5e5..67126ab35 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -5608,12 +5608,12 @@ static CURLcode create_conn(struct SessionHandle *data,
     if((data->state.authhost.picked & (CURLAUTH_NTLM | CURLAUTH_NTLM_WB)) &&
        data->state.authhost.done) {
       infof(data, "NTLM picked AND auth done set, clear picked!\n");
-      data->state.authhost.picked = 0;
+      data->state.authhost.picked = CURLAUTH_NONE;
     }
     if((data->state.authproxy.picked & (CURLAUTH_NTLM | CURLAUTH_NTLM_WB)) &&
        data->state.authproxy.done) {
       infof(data, "NTLM-proxy picked AND auth done set, clear picked!\n");
-      data->state.authproxy.picked = 0;
+      data->state.authproxy.picked = CURLAUTH_NONE;
     }
 
   }