When the FreeCast swing node configuration doesn't include an audio player, the application can't start.
Configuration example :
<node>
...
<players>
<player>
<class>http</class>
<listenaddress>
<port>8799</port>
</listenaddress>
</player>
</players>
...
</node>
Result :
FATAL [Application]: Error in the main thread
java.lang.NullPointerException
at org.kolaka.freecast.node.swing.PlayDescriptionPane.<init>(PlayDescriptionPane.java:117)
at org.kolaka.freecast.node.swing.MainFrame.createOptionalPane(MainFrame.java:86)
at org.kolaka.freecast.swing.BaseFrame.createToolBarPane(BaseFrame.java:191)
at org.kolaka.freecast.swing.BaseFrame.init(BaseFrame.java:112)
at org.kolaka.freecast.node.swing.Main.postInit(Main.java:87)
at org.kolaka.freecast.Application.init(Application.java:170)
at org.kolaka.freecast.Application.run(Application.java:188)
at org.kolaka.freecast.node.swing.Main.main(Main.java:58)
The swing client should make a warn message and disable the audio player GUI part.
