Fix closure's reference to outer closure

#KT-3276 Fixed

compiler/testData/codegen/box/closures/closureInsideClosure/localFunInsideLocalFun.kt

@@ -0,0 +1,13 @@
+fun box(): String {
+    fun rec(n : Int) {
+        fun x(m : Int) {
+            if (n > 0) rec(n - 1)
+        }
+
+        x(0)
+    }
+
+    rec(5)
+    
+    return "OK"
+}