remoteOpenConn: Pass correct variable to virConnectSetIdentity()

The remoteOpenConn() function was refactored recently. As a part
of that new variable @newconn was introduced which holds
virConnect object as it's being gradually constructed throughout
the function. At the very end, when everything succeeded the
variable is stolen into passed @conn. However, there was one
line missed in the refactor which still access the @conn instead
of @newconn leading to a NULL dereference.

Fixes: f7c422993e
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>

src/remote/remote_daemon_dispatch.c

@@ -1829,7 +1829,7 @@ remoteOpenConn(const char *uri,
     VIR_DEBUG("Opened driver %p", newconn);
 
     if (preserveIdentity) {
-        if (virConnectSetIdentity(*conn, identparams->par, identparams->npar, 0) < 0)
+        if (virConnectSetIdentity(newconn, identparams->par, identparams->npar, 0) < 0)
             return -1;
 
         VIR_DEBUG("Forwarded current identity to secondary driver");