Bug 213474 [Markers] Unchecking filter does not update
I20071218-0800. 1. Show > TODO ==> filter is applied 2. Show > TODO ==> nothing happens, old filter stays but view menu looks like this: [ ] TODO ---- [x] Show All
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/CachedMarkerBuilder.java
} finally {
			building = false;
		}
	}
	/**
	 * Break the marker up into categories
	 * 
	 * @param markers
	 * @param start
	 *            the start index in the markers
	 * @param end
	 *            the last index to check
	 * @param sortIndex -
	 *            the parent of the field
	 * @return MarkerCategory[] or <code>null</code> if we are at the bottom
	 *         of the tree
	 */
	MarkerCategory[] buildHierarchy(MarkerMap markers, int start, int end,
			int sortIndex) {
		MarkerComparator sorter = getComparator();
		if (sortIndex > 0) {
			return null;
		}
		Collection categories = new ArrayList();
		Object previous = null;
		int categoryStart = start;
		Object[] elements = markers.toArray();
		for (int i = start; i <= end; i++) {
			if (previous != null) {