Fix new window example.

Author: tinevez

src/test/java/org/mastodon/revised/mamut/MastodonLoggerExample.java

@@ -30,7 +30,6 @@ public void run()
 					windowManager.projectManager.open( project );
 
 					final MastodonMainWindow frame = new MastodonMainWindow( windowManager );
-					frame.pack();
 					frame.setVisible( true );
 
 					// Send some messages.