[NF] Fix scope in Inst.instExpressions.

Belonging to [master]:
  - #2530

Author: perost

Compiler/NFFrontEnd/NFInst.mo

@@ -1815,7 +1815,7 @@ algorithm
 
     case Class.EXPANDED_DERIVED(dims = dims)
       algorithm
-        sections := instExpressions(cls.baseClass, cls.baseClass, sections);
+        sections := instExpressions(cls.baseClass, scope, sections);
 
         dim_scope := InstNode.parent(node);
         info := InstNode.info(node);