Java to Kotlin converter: fixed exception on conversion

j2k/tests/testData/ast/foreachStatement/nullableIterable.java

@@ -0,0 +1,12 @@
+//file
+import java.util.List;
+
+class A {
+    List<String> list = null;
+
+    void foo() {
+        for (String e : list) {
+            System.out.println(e);
+        }
+    }
+}