Fix false assert when CONNECTIVITY_DEBUG is enabled

eeschema/connection_graph.cpp

@@ -930,6 +930,7 @@ void CONNECTION_GRAPH::buildConnectionGraph()
                         else
                         {
                             #ifdef CONNECTIVITY_DEBUG
+                            if( c != candidate_net_code )
                                 wxASSERT_MSG( false, "More than one net code for a neighbor!" );
                             #endif
                         }