Merge pull request #606 from artem-smotrakov/fix-javadoc

Fix javadoc

src/main/java/org/json/JSONObject.java

@@ -128,6 +128,7 @@ protected final Object clone() {
          *         null.
          */
         @Override
+        @SuppressWarnings("lgtm[java/unchecked-cast-in-equals]")
         public boolean equals(Object object) {
             return object == null || object == this;
         }