NETINFO_ITEM for orphaned items now have empty netname and net code = 0 (to avoid problems).

Fixed case for the footprint legacy plugin when added module's do not have set parent (BOARD).
Added copyright notice for pcbnew/class_netinfolist.cpp (feel free to correct, it is just copied from corresponding header file).

pcbnew/class_netinfolist.cpp

+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2009 Jean-Pierre Charras, jaen-pierre.charras@gipsa-lab.inpg.com
+ * Copyright (C) 1992-2012 KiCad Developers, see AUTHORS.txt for contributors.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
 /**
  * @file class_netinfolist.cpp
  */
@@ -230,7 +254,8 @@ void NETINFO_MAPPING::Update()
     // Prepare the new mapping
     m_netMapping.clear();
 
-    // Now the nets variable stores all the used net codes (not only for pads)
+    // Now the nets variable stores all the used net codes (not only for pads) and we are ready to
+    // assign new consecutive net numbers
     int newNetCode = 0;
     for( std::set<int>::const_iterator it = nets.begin(), itEnd = nets.end(); it != itEnd; ++it )
         m_netMapping[*it] = newNetCode++;
@@ -249,5 +274,6 @@ NETINFO_ITEM* NETINFO_MAPPING::iterator::operator->() const
 }
 
 
-const NETINFO_ITEM NETINFO_LIST::ORPHANED = NETINFO_ITEM( NULL, wxString::FromUTF8( "orphaned" ), -1 );
 const int NETINFO_LIST::UNCONNECTED = 0;
+const NETINFO_ITEM NETINFO_LIST::ORPHANED = NETINFO_ITEM( NULL, wxEmptyString,
+                                                          NETINFO_LIST::UNCONNECTED );

pcbnew/legacy_plugin.cpp

@@ -1303,7 +1303,10 @@ void LEGACY_PLUGIN::loadPAD( MODULE* aModule )
 
             // read Netname
             ReadDelimitedText( buf, data, sizeof(buf) );
-            assert( m_board->FindNet( netcode )->GetNetname() == FROM_UTF8( StrPurge( buf ) ) );
+#ifndef NDEBUG
+            if( m_board )
+                assert( m_board->FindNet( netcode )->GetNetname() == FROM_UTF8( StrPurge( buf ) ) );
+#endif /* NDEBUG */
         }
 
         else if( TESTLINE( "Po" ) )         // (Po)sition