-static char *x11_verify(unsigned long peer_ip, int peer_port,
- tree234 *authtree, char *proto,
- unsigned char *data, int dlen,
- struct X11FakeAuth **auth_ret)
+static const char *x11_verify(unsigned long peer_ip, int peer_port,
+ tree234 *authtree, char *proto,
+ unsigned char *data, int dlen,
+ struct X11FakeAuth **auth_ret)