--- a/BSPModel.cpp	Mon May 12 12:27:50 2014 +0600
+++ b/BSPModel.cpp	Mon May 12 12:28:06 2014 +0600
@@ -11,11 +11,11 @@
   free(this->pVertices.pVertices);
   this->pVertices.pVertices = 0;
   free(this->pFaces);
-  this->pFaces = 0;
+  this->pFaces = nullptr;
   free(this->pFacesOrdering);
-  this->pFacesOrdering = 0;
+  this->pFacesOrdering = nullptr;
   free(this->pNodes);
-  this->pNodes = 0;
+  this->pNodes = nullptr;
   this->uNumNodes = 0;
   this->uNumFaces = 0;
   this->pVertices.uNumVertices = 0;