KT-4119: Back-end (JVM) Internal error on code with local extensions

#KT-4119 Fixed

compiler/testData/codegen/box/functions/localFunctions/kt4119_2.kt

@@ -0,0 +1,19 @@
+fun box(): String {
+    fun Int.foo(a: Int): Int = a + 2
+
+    val s = object {
+        fun test(): Int {
+            return 1 foo 1
+        }
+    }
+
+    fun local(): Int {
+        return 1 foo 1
+    }
+
+    if (s.test() != 3) return "Fail"
+
+    if (local() != 3) return "Fail"
+
+    return "OK"
+}