fix cast away const qualifier

e714e26f · Jan Trávníček · 9a0de678 · e714e26f
Commit e714e26f authored 6 years ago by Jan Trávníček
--- a/alib2std/src/extensions/tree_base.hpp
+++ b/alib2std/src/extensions/tree_base.hpp
@@ -37,7 +37,7 @@ class BaseNode {
 	}
  
 	const Data * operator ->( ) const {
-		return static_cast < Data * > ( this );
+		return static_cast < const Data * > ( this );
 	}
  
 public: