conversions as wrappers; generate !! instead of sure() (for constructor calls only for now)

tests/testData/ast/issues/file/kt-792.kt

@@ -2,6 +2,6 @@ package demo
 open class Test(i : Int) {
 open fun test() : Unit {
 var b : Byte = 10
-Test((b).toInt())
+Test(b.toInt())
 }
 }

tests/testData/ast/issues/file/kt-809.kt

@@ -14,6 +14,6 @@ open fun putInt(i : Int) : Unit {
 }
 open fun test() : Unit {
 putInt((One.myContainer?.myInt).sure())
-IntContainer((One.myContainer?.myInt).sure())
+IntContainer(One.myContainer?.myInt!!)
 }
 }