Fixed a hidden overloaded virtual function warning in PNS

pcbnew/router/pns_item.h

@@ -1,7 +1,7 @@
 /*
  * KiRouter - a push-and-(sometimes-)shove PCB router
  *
- * Copyright (C) 2013-2014 CERN
+ * Copyright (C) 2013-2017 CERN
  * Copyright (C) 2016 KiCad Developers, see AUTHORS.txt for contributors.
  * Author: Tomasz Wlostowski <[email protected]>
  *
@@ -298,12 +298,12 @@ public:
         return NULL;
     }
 
-    virtual void Mark(int aMarker)
+    virtual void Mark( int aMarker )
     {
         m_marker = aMarker;
     }
 
-    virtual void Unmark(int aMarker = -1)
+    virtual void Unmark( int aMarker = -1 )
     {
         m_marker &= ~aMarker;
     }

pcbnew/router/pns_line.cpp

@@ -1,7 +1,7 @@
 /*
  * KiRouter - a push-and-(sometimes-)shove PCB router
  *
- * Copyright (C) 2013-2014 CERN
+ * Copyright (C) 2013-2017 CERN
  * Copyright (C) 2016 KiCad Developers, see AUTHORS.txt for contributors.
  * Author: Tomasz Wlostowski <[email protected]>
  *
@@ -93,10 +93,10 @@ void LINE::Mark( int aMarker )
 }
 
 
-void LINE::Unmark()
+void LINE::Unmark( int aMarker )
 {
     for( SEGMENT* s : m_segmentRefs )
-        s->Unmark();
+        s->Unmark( aMarker );
 
     m_marker = 0;
 }

pcbnew/router/pns_line.h

@@ -1,7 +1,7 @@
 /*
  * KiRouter - a push-and-(sometimes-)shove PCB router
  *
- * Copyright (C) 2013-2014 CERN
+ * Copyright (C) 2013-2017 CERN
  * Copyright (C) 2016 KiCad Developers, see AUTHORS.txt for contributors.
  * Author: Tomasz Wlostowski <[email protected]>
  *
@@ -253,7 +253,7 @@ public:
     const VIA& Via() const { return m_via; }
 
     virtual void Mark( int aMarker ) override;
-    virtual void Unmark ();
+    virtual void Unmark( int aMarker = -1 ) override;
     virtual int Marker() const override;
 
     void DragSegment( const VECTOR2I& aP, int aIndex, int aSnappingThreshold = 0 );