Preserve logic that assumes footprint shapes can't have nets

pcbnew/pcb_shape.cpp

@@ -86,6 +86,13 @@ bool PCB_SHAPE::IsType( const std::vector<KICAD_T>& aScanTypes ) const
 }
 
 
+bool PCB_SHAPE::IsConnected() const
+{
+    // Only board-level copper shapes are connectable
+    return IsOnCopperLayer() && !GetParentFootprint();
+}
+
+
 void PCB_SHAPE::SetLayer( PCB_LAYER_ID aLayer )
 {
     BOARD_ITEM::SetLayer( aLayer );

pcbnew/pcb_shape.h

@@ -57,6 +57,8 @@ public:
         return wxT( "PCB_SHAPE" );
     }
 
+    bool IsConnected() const override;
+
     wxString GetFriendlyName() const override { return EDA_SHAPE::GetFriendlyName(); }
 
     bool IsType( const std::vector<KICAD_T>& aScanTypes ) const override;