KT-2270 VerifyError when default value of constructor parameter is previous parameter

#KT-2270 Fixed

compiler/testData/codegen/functions/defaultargs6.kt

@@ -0,0 +1,7 @@
+trait A {
+    fun foo(x: Int, y: Int = x + 20, z: Int = y * 2) = z
+}
+
+class B : A {}
+
+fun box() = if (B().foo(1) == 42) "OK" else "Fail"

compiler/testData/codegen/functions/defaultargs7.kt

@@ -0,0 +1,5 @@
+class A(val expected: Int) {
+    fun foo(x: Int, y: Int = x + 20, z: Int = y * 2) = z == expected
+}
+
+fun box() = if (A(42).foo(1)) "OK" else "Fail"

compiler/testData/codegen/regressions/kt2270.kt

@@ -0,0 +1,6 @@
+class A(
+        val i : Int,
+        val j : Int = i
+)
+
+fun box() = if (A(1).j == 1) "OK" else "fail"