[NF] Handle records in Connector.split.

Belonging to [master]:
  - #2343
  - OpenModelica/OpenModelica-testsuite#915

Author: perost

Compiler/NFFrontEnd/NFConnector.mo

@@ -177,6 +177,7 @@ protected
         Type t;
         ComplexType ct;
         Option<ComponentRef> aflow;
+        ClassTree tree;
 
       case Type.COMPLEX(complexTy = ct as ComplexType.CONNECTOR())
         algorithm
@@ -190,6 +191,14 @@ protected
         then
           conns;
 
+      case Type.COMPLEX()
+        algorithm
+          tree := Class.classTree(InstNode.getClass(ty.cls));
+          conns := splitImpl2(name, face, source,
+            arrayList(ClassTree.getComponents(tree)), associatedFlow, conns);
+        then
+          conns;
+
       case Type.ARRAY()
         algorithm
           t := Type.arrayElementType(ty);