RFC: Fixes for some race conditions in the plugin

[Omair Majid]

Deepak Bhole wrote:
> Hi,
> 
> Attached patch fixes a bunch of race conditions currently prevalent in
> the plugin. These conditions manifest as a result of the multi stage
> asynch. init process -- init is 2 stage, and between those stages,
> messages like size information and dispose can come through. This patch
> ensures that the various orders are accounted for.
> 
> ChangeLog:
>     * IcedTeaPlugin.cc: Fix race condition that led to segfault.
>     * plugin/icedtea/sun/applet/PluginAppletViewer.java: Fix a host of race
>     conditions brought about by the multi stage asynchronous initialization
>     design.
>     * rt/net/sourceforge/jnlp/NetxPanel.java: Account for case where handler
>     may be null due to an error above.
> 
Looks good to me!

Cheers,
Omair