[GREENFOOT-101] Invoking static methods does not show return values

When invoking a static method that has a return value, the return value is never shown.

This exception is thrown: Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at greenfoot.core.WorldInvokeListener$1$1.run(WorldInvokeListener.java:103) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEvent(EventQueue.java:461) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:176) at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

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Issue metadata

• Issue type: Bug
• Priority: Medium
• Fix versions: 1.4.1