fix stupid bug introduced during refactoring

idea/testData/codegen/typeInfo/asInLoop.jet

@@ -0,0 +1,7 @@
+import java.io.*
+fun main(args: Array<String>) {
+  val reader = new BufferedReader(new InputStreamReader(System.`in`))
+  while(true) {
+    val cmd = reader.readLine() as String
+  }
+}