[NB] update initial call cleanup (OpenModelica#12602)

- traverse all equations and not only when conditions (can be anywhere in an if-expression)

OMCompiler/Compiler/NBackEnd/Modules/1_Main/NBInitialization.mo

@@ -545,19 +545,13 @@ public
   function cleanupInitialCall
     input output Equation eq;
     input Boolean init;
+  protected
+    Pointer<Boolean> simplify = Pointer.create(false);
   algorithm
-    eq := match eq
-      local
-        WhenEquationBody body;
-        Pointer<Boolean> simplify;
-      case Equation.WHEN_EQUATION(body = body) algorithm
-        simplify := Pointer.create(false);
-        body.condition := Expression.map(body.condition, function cleanupInitialCallExp(init = init, simplify = simplify));
-        // TODO simplify when equation if `Pointer.access(simplify)` is true
-        eq.body := body;
-      then Equation.simplify(eq);
-      else eq;
-    end match;
+    eq := Equation.map(eq, function cleanupInitialCallExp(init = init, simplify = simplify));
+    if Pointer.access(simplify) then
+      eq := Equation.simplify(eq);
+    end if;
   end cleanupInitialCall;
 
   function cleanupInitialCallExp