fixed Issue 271: @NotNull annotations should introduce a null check

test/transform/resource/before/NonNullPlain.java

@@ -1,10 +1,17 @@
+import java.lang.annotation.*;
+
+@lombok.RequiredArgsConstructor
+@lombok.Getter
+@lombok.Setter
 class NonNullPlain {
-	@lombok.Setter
 	@lombok.NonNull
-	@lombok.Getter int i;
-	
-	@lombok.Getter
-	@lombok.Setter
+	int i;
 	@lombok.NonNull
 	String s;
+	@NotNull
+	Object o;
+	
+	@Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER, ElementType.LOCAL_VARIABLE})
+	@Retention(RetentionPolicy.CLASS)
+	public @interface NotNull {}
 }