client: fix windows managed on startup

We need to not take the UNVIEWABLE, but everything else should be
managed.

Signed-off-by: Julien Danjou <julien@danjou.info>

awesome.c

@@ -105,8 +105,7 @@ scan(void)
             state = window_getstate(wins[i]);
 
             if(!attr_r || attr_r->override_redirect
-               || attr_r->map_state != XCB_MAP_STATE_VIEWABLE
-               || state == XCB_WM_WITHDRAWN_STATE)
+               || attr_r->map_state == XCB_MAP_STATE_UNVIEWABLE)
             {
                 p_delete(&attr_r);
                 continue;