Silence swig warning about director method

We expose the get_async_stop method which we should only use internally
and swig gets upset about it. Hide it with an ifdef

    [29/218] Swig compile ovpncli.i for python
    /Users/arne/ovpn/ovpn3-build/ovpn3/core/client/ovpncli.hpp:755: Warning 473: Returning a reference, pointer or pointer wrapper in a director method is not recommended.

Signed-off-by: Arne Schwabe <arne@openvpn.net>

Author: schwabe

client/ovpncli.hpp

@@ -752,7 +752,11 @@ class OpenVPNClient : public TunBuilderBase,             // expose tun builder v
     virtual void connect_run();
     virtual void connect_session_stop();
 
+#ifndef SWIG
+    /* hide this function from swig as it otherwise complains about a director
+     * method returning a pointer and the swig interfaces does not need this method. */
     virtual Stop *get_async_stop();
+#endif
 
     Private::ClientState *state;