Bug#874649: FTBFS with Java 9: upstream won't support it for now

[Emmanuel Bourg]

On Fri, 8 Sep 2017 14:01:04 +0100 Chris West <solo-debianbugs at goeswhere.com> wrote:

> Build log:
> 
>     [javac] /build/libjna-java-4.4.0/contrib/platform/src/com/sun/jna/platform/WindowUtils.java:1392: error: cannot find symbol
>     [javac]                     Object peer = w.getPeer();
>     [javac]                                    ^
>     [javac]   symbol:   method getPeer()
>     [javac]   location: variable w of type Window

The setWindowAlpha() method affected is an implementation for Mac OS
only, we can simply scrap it. Java 7 provides an alternative with the
Window.setOpacity(float) method if we want to be nice to Mac users
cherry picking our jars :)

Emmanuel Bourg