session client BUGFIX session wthout transport freeing

Fixes CESNET/netopeer2#1136

Author: michalvasko

src/session_client_tls.c

@@ -759,6 +759,7 @@ nc_connect_libssl(SSL *tls, struct ly_ctx *ctx)
     return session;
 
 fail:
+    session->ti_type = NC_TI_NONE;
     session->ti.tls = NULL;
     nc_session_free(session, NULL);
     return NULL;