fix numeric equality check

[hdeadman]

This changes a couple places where the equal operator (or not equal operator) was used with Double objects. According to IntelliJ these were the only two instances of that being done.

[urbancamo]

Hi @hdeadman, thanks for the PR. I've created an alternative that uses best practices as documented here https://www.baeldung.com/java-comparing-doubles, please check here: https://github.com/urbancamo/javaapiforkml/pull/45

Let me know if you have any comments. Regards, Mark