Fix closure's reference to outer closure

#KT-3276 Fixed

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

@@ -0,0 +1,16 @@
+fun box(): String {
+    fun foo(x: Int, s: String): String {
+        fun bar(y: Int) {
+            fun baz(z: Int, k: Int) {
+                foo(x - 1 + k, "Fail")
+            }
+            
+            baz(y, 0)
+        }
+        
+        if (x > 0) bar(x)
+        return s
+    }
+    
+    return foo(1, "OK")
+}