Neighbor::getRegion Naive debug: check null pointer.

include/lsgrmGraphOperations.txx

@@ -1052,9 +1052,12 @@ void RemoveEdgeToUnstableNode(typename TSegmenter::NodePointerType nodePtr)
   for(auto& edg : nodePtr->m_Edges)
     {
     auto nodeNeighbor = edg.GetRegion();
-    auto EdgeToNode = grm::GraphOperations<TSegmenter>::FindEdge(nodeNeighbor, nodePtr);
-    assert(EdgeToNode != nodeNeighbor->m_Edges.end());
-    nodeNeighbor->m_Edges.erase(EdgeToNode);
+    //RAFGAET : Naive debug, do not process if NULL pointer
+    if (nodeNeighbor) { //added
+		auto EdgeToNode = grm::GraphOperations<TSegmenter>::FindEdge(nodeNeighbor, nodePtr);
+		assert(EdgeToNode != nodeNeighbor->m_Edges.end());
+		nodeNeighbor->m_Edges.erase(EdgeToNode);
+	} //added
     }
 }