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
}
	if (doStruct) {
		
		updateChildren(widget, element, null);
	}
	
	Item[] children= getChildren(widget);
	if (children != null) {
		for (int i= 0; i < children.length; i++) {
			Widget item= children[i];
			Object data= item.getData();
			if (data != null)
				internalRefresh(item, data, doStruct);
		}
	}
}
/**
 * Removes the given elements from this viewer.
 *
 * @param elements the elements to remove
 */
private void internalRemove(Object[] elements) {
	Object input = getInput();
	HashSet parentItems = new HashSet(5);
	for (int i = 0; i < elements.length; ++i) {
		if (elements[i].equals(input)) {
			setInput(null);
			return;
		}
		Widget childItem = findItem(elements[i]);