Bug 15844 [Exception Handling] SelectionChange events and NPE
Build 20020508 Due to new global actions there are now more objects listening to selection changes send out by a JFace viewer. We now had the case that one of the listener generated a NPE. As a result all listeners registered after that one didn't receive the selection change event. StructuredViewers should be more fault tolorant to exceptions when informing listeners.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
Item item = items[i];
		Object data = item.getData();
		if (data != null && data.equals(element))
			return item;
	}
	return null;
}
/**
 * Recursively tries to find the given element.
 *
 * @param parent the parent item
 * @param element the element
 */
private Widget internalFindItem(Item parent, Object element) {
	
	Object data= parent.getData();
	if (data != null) {
		if (data.equals(element))
			return parent;
	}
	
	Item[] items= getChildren(parent);
	for (int i= 0; i < items.length; i++) {
		Item item= items[i];
		Widget o= internalFindItem(item, element);
		if (o != null)
			return o;
	}
	return null;
}