FIR: fix private-to-this corner case with outer class type parameter

Related to KT-49875

compiler/testData/diagnostics/tests/visibility/privateToThis.kt

@@ -3,6 +3,8 @@
 class A<in T>(t: T) {
     private val t: T = t  // PRIVATE_TO_THIS
 
+    private val i: B = B()
+
     fun test() {
         val x: T = t      // Ok
         val y: T = this.t // Ok
@@ -11,4 +13,14 @@ class A<in T>(t: T) {
     fun foo(a: A<String>) {
         val x: String = a.<!INVISIBLE_MEMBER!>t<!> // Invisible!
     }
+
+    fun bar(a: A<*>) {
+        a.<!INVISIBLE_MEMBER!>t<!> // Invisible!
+    }
+
+    inner class B {
+        fun baz(a: A<*>) {
+            a.i
+        }
+    }
 }