[NF] Hack to fix some array conditions.

- Handle component and if expression conditions that evaluate to
  arrays (due to array modifiers) by checking if all scalar elements
  are the same value, and in that case use that value.

Belonging to [master]:
  - #2962

Compiler/NFFrontEnd/NFFlatten.mo

@@ -317,6 +317,11 @@ algorithm
     exp := Binding.getTypedExp(cond);
     exp := Ceval.evalExp(exp, Ceval.EvalTarget.CONDITION(Binding.getInfo(cond)));
 
+    // Hack to make arrays work when all elements have the same value.
+    if Expression.arrayAllEqual(exp) then
+      exp := Expression.arrayFirstScalar(exp);
+    end if;
+
     isDeleted := match exp
       case Expression.BOOLEAN() then not exp.value;
       else

Compiler/NFFrontEnd/NFTyping.mo

@@ -2022,6 +2022,10 @@ protected
 algorithm
   cond_exp := Ceval.evalExp(condExp, Ceval.EvalTarget.GENERIC(info));
 
+  if Expression.arrayAllEqual(cond_exp) then
+    cond_exp := Expression.arrayFirstScalar(cond_exp);
+  end if;
+
   condBool := match cond_exp
     case Expression.BOOLEAN() then cond_exp.value;
     else