Fixed invisible tracks in PNS.

pcbnew/router/router_preview_item.cpp

@@ -241,7 +241,7 @@ void ROUTER_PREVIEW_ITEM::Line( const SHAPE_LINE_CHAIN& aLine, int aWidth, int a
     m_width = aWidth;
     m_color = assignColor( aStyle );
     m_type = PR_SHAPE;
-    m_depth = -2047;
+    m_depth = -BaseOverlayDepth;
     m_shape = aLine.Clone();
 
     ViewSetVisible( true );
@@ -306,3 +306,7 @@ const COLOR4D ROUTER_PREVIEW_ITEM::assignColor( int aStyle ) const
 
     return color;
 }
+
+const int ROUTER_PREVIEW_ITEM::ClearanceOverlayDepth = -200;
+const int ROUTER_PREVIEW_ITEM::BaseOverlayDepth = -210;
+const int ROUTER_PREVIEW_ITEM::ViaOverlayDepth = -246;

pcbnew/router/router_preview_item.h

@@ -114,9 +114,9 @@ private:
     int m_clearance;
 
     // fixme: shouldn't this go to VIEW?
-    static const int ClearanceOverlayDepth = -2000;
-    static const int BaseOverlayDepth = -2010;
-    static const int ViaOverlayDepth = -2046;
+    static const int ClearanceOverlayDepth;
+    static const int BaseOverlayDepth;
+    static const int ViaOverlayDepth;
 
     double m_depth;