More pointers pre-asserts
diff --git a/tinyxml2.h b/tinyxml2.h
index 266efc7..54190c9 100755
--- a/tinyxml2.h
+++ b/tinyxml2.h
@@ -1666,6 +1666,8 @@
     	It will be unlinked from the DOM.

     */

     void DeleteNode( XMLNode* node )	{

+        TIXMLASSERT( node );

+        TIXMLASSERT( node->_parent );

         node->_parent->DeleteChild( node );

     }