Fix joy accels when emulation is paused.

Start the joystick polling timer on pause and stop it on resume, so that
accelerators bound to joystick events are still processed.

Followup on def5d3e4.

Signed-off-by: Rafael Kitover <rkitover@gmail.com>

src/wx/panel.cpp

@@ -969,6 +969,8 @@ void GameArea::Pause()
 
     if (loaded != IMAGE_UNKNOWN)
         soundPause();
+
+    wxGetApp().frame->StartJoyPollTimer();
 }
 
 void GameArea::Resume()
@@ -982,6 +984,8 @@ void GameArea::Resume()
     if (loaded != IMAGE_UNKNOWN)
         soundResume();
 
+    wxGetApp().frame->StopJoyPollTimer();
+
     SetFocus();
 }