Java to Kotlin converter: even more smartness about nullability

j2k/tests/testData/ast/nullability/FieldComparedWithNull3.java

@@ -0,0 +1,12 @@
+//file
+class C {
+    public String s = "";
+}
+
+class D {
+    void foo(C c) {
+        if (null == c.s) {
+            System.out.println("null");
+        }
+    }
+}