Fix NoSuchMethodError on private components of data classes

A follow-up to
https://github.com/JetBrains/kotlin/commit/d5681540ec47ee5c9a548ba56df8b4e20097549d

compiler/backend/src/org/jetbrains/jet/codegen/ImplementationBodyCodegen.java

@@ -833,9 +833,9 @@ public class ImplementationBodyCodegen extends ClassBodyCodegen {
                     Type componentType = signature.getReturnType();
                     InstructionAdapter iv = new InstructionAdapter(mv);
                     if (!componentType.equals(Type.VOID_TYPE)) {
-                        iv.load(0, classAsmType);
-                        String desc = "()" + componentType.getDescriptor();
-                        iv.invokevirtual(classAsmType.getInternalName(), PropertyCodegen.getterName(parameter.getName()), desc, false);
+                        PropertyDescriptor property =
+                                bindingContext.get(BindingContext.PRIMARY_CONSTRUCTOR_PARAMETER, descriptorToDeclaration(parameter));
+                        genPropertyOnStack(iv, context, property, 0);
                     }
                     iv.areturn(componentType);
                 }

compiler/testData/codegen/boxWithStdlib/dataClasses/privateValParams.kt

@@ -1,4 +1,6 @@
-data class D(private val x: Long, private val y: Char)
+data class D(private val x: Long, private val y: Char) {
+    fun foo() = "${component1()}${component2()}"
+}
 
 fun box(): String {
     val d1 = D(42L, 'a')
@@ -6,5 +8,6 @@ fun box(): String {
     if (d1 != d2) return "Fail equals"
     if (d1.hashCode() != d2.hashCode()) return "Fail hashCode"
     if (d1.toString() != d2.toString()) return "Fail toString"
+    if (d1.foo() != d2.foo()) return "Fail foo"
     return "OK"
 }