mavproxy_map: import wx_processguard required for macOS

- Ignore Module imported but unused (F401)

Signed-off-by: Rhys Mainwaring <[email protected]>

Author: srmainwaring

MAVProxy/modules/mavproxy_map/mp_slipmap.py

@@ -73,6 +73,7 @@ def child_task(self):
         '''child process - this holds all the GUI elements'''
         mp_util.child_close_fds()
 
+        from MAVProxy.modules.lib import wx_processguard # noqa:F401
         from MAVProxy.modules.lib.wx_loader import wx
         from MAVProxy.modules.mavproxy_map.mp_slipmap_ui import MPSlipMapFrame