[NF] Add nested 'end' test.

Belonging to [master]:
  - OpenModelica/OMCompiler#2485
  - OpenModelica/OpenModelica-testsuite#969

flattening/modelica/scodeinst/End5.mo

@@ -0,0 +1,34 @@
+// name: End5
+// keywords:
+// status: correct
+// cflags: -d=newInst
+//
+//
+
+model End5
+  Real x[4, 3];
+  Integer y[2];
+equation
+  x[y[end], end] = time;
+end End5;
+
+// Result:
+// class End5
+//   Real x[1,1];
+//   Real x[1,2];
+//   Real x[1,3];
+//   Real x[2,1];
+//   Real x[2,2];
+//   Real x[2,3];
+//   Real x[3,1];
+//   Real x[3,2];
+//   Real x[3,3];
+//   Real x[4,1];
+//   Real x[4,2];
+//   Real x[4,3];
+//   Integer y[1];
+//   Integer y[2];
+// equation
+//   x[y[2],3] = time;
+// end End5;
+// endResult

flattening/modelica/scodeinst/Makefile

@@ -264,6 +264,7 @@ End1.mo \
 End2.mo \
 End3.mo \
 End4.mo \
+End5.mo \
 EndInvalid1.mo \
 EndInvalid2.mo \
 enum1.mo \