Slight change to screen reader rectangles about tracks on Windows

src/TrackPanelAx.cpp

@@ -309,7 +309,11 @@ wxAccStatus TrackPanelAx::GetLocation( wxRect& rect, int elementId )
       rect = mTrackPanel->FindTrackRect( t, false );
       // Inflate the screen reader's rectangle so it overpaints Audacity's own
       // yellow focus rectangle.
+#ifdef __WXMAC__
       const int dx = 2;
+#else
+      const int dx = 1;
+#endif
       rect.Inflate(dx, dx);
    }