RN_DATA::GetNets() -> RN_DATA::GetNet() with an assert to check if someone...

RN_DATA::GetNets() -> RN_DATA::GetNet() with an assert to check if someone calls it for the unconnected net.
Only items that belong to a net are removed from ratsnest.

pcbnew/class_board.cpp

@@ -880,7 +880,8 @@ BOARD_ITEM* BOARD::Remove( BOARD_ITEM* aBoardItem )
             }
         }
 
-        m_ratsnest->GetNets()[zone->GetNet()].RemoveItem( zone );
+        if( zone->GetNet() > 0 )
+            m_ratsnest->GetNet( zone->GetNet() ).RemoveItem( zone );
     }
     break;
 
@@ -890,7 +891,10 @@ BOARD_ITEM* BOARD::Remove( BOARD_ITEM* aBoardItem )
         m_Modules.Remove( (MODULE*) aBoardItem );
 
         for( D_PAD* pad = module->Pads().GetFirst(); pad; pad = pad->Next() )
-            m_ratsnest->GetNets()[pad->GetNet()].RemoveItem( pad );
+        {
+            if( pad->GetNet() > 0 )
+                m_ratsnest->GetNet( pad->GetNet() ).RemoveItem( pad );
+        }
     }
     break;
 
@@ -898,7 +902,9 @@ BOARD_ITEM* BOARD::Remove( BOARD_ITEM* aBoardItem )
     {
         TRACK* track = static_cast<TRACK*>( aBoardItem );
         m_Track.Remove( track );
-        m_ratsnest->GetNets()[track->GetNet()].RemoveItem( track );
+
+        if( track->GetNet() > 0 )
+            m_ratsnest->GetNet( track->GetNet() ).RemoveItem( track );
     }
     break;
 
@@ -906,7 +912,9 @@ BOARD_ITEM* BOARD::Remove( BOARD_ITEM* aBoardItem )
     {
         SEGVIA* via = static_cast<SEGVIA*>( aBoardItem );
         m_Track.Remove( via );
-        m_ratsnest->GetNets()[via->GetNet()].RemoveItem( via );
+
+        if( via->GetNet() > 0 )
+            m_ratsnest->GetNet( via->GetNet() ).RemoveItem( via );
     }
     break;
 

pcbnew/ratsnest_data.h

@@ -573,13 +573,26 @@ public:
     void Recalculate( int aNet = -1 );
 
     /**
-     * Function GetNets()
+     * Function GetNetCount()
+     * Returns the number of nets handled by the ratsnest.
+     * @return Number of the nets.
+     */
+    int GetNetCount() const
+    {
+        return m_nets.size();
+    }
+
+    /**
+     * Function GetNet()
      * Returns ratsnest grouped by net numbers.
-     * @return Vector of ratsnest grouped by net numbers.
+     * @param aNetCode is the net code.
+     * @return Ratsnest data for a specified net.
      */
-    std::vector<RN_NET>& GetNets()
+    RN_NET& GetNet( int aNetCode )
     {
-        return m_nets;
+        assert( aNetCode > 0 );     // ratsnest does not handle the unconnected net
+
+        return m_nets[aNetCode];
     }
 
 protected:

pcbnew/ratsnest_viewitem.cpp

@@ -59,9 +59,11 @@ void RATSNEST_VIEWITEM::ViewDraw( int aLayer, GAL* aGal ) const
     aGal->SetLineWidth( 1.0 );
     aGal->SetStrokeColor( COLOR4D( 0.8, 0.8, 0.8, 0.2 ) );
 
-    // Draw the temporary ratsnest
-    BOOST_FOREACH( const RN_NET& net, m_data->GetNets() )
+    // Draw the temporary ratsnest (skip the unconnected net [net code == 0])
+    for( int i = 1; i < m_data->GetNetCount(); ++i )
     {
+        const RN_NET& net = m_data->GetNet( i );
+
         if( !net.IsVisible() )
             continue;