Bug 203838 [Markers] [Markers] clicking on column headers does not sort table
I20070918 Clicking on any of the column headers does not sort based on the relevant column.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/MarkerComparator.java
* Compare the two objects to see if they have the same category value
	 * 
	 * @param object1
	 * @param object2
	 * @return int
	 * @see Comparable#compareTo(Object)
	 */
	public int compareCategory(Object object1, Object object2) {
		if (category == null)
			return 0;
		return category.compare((MarkerItem) object1, (MarkerItem) object2);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
	 */
	public int compare(Object arg0, Object arg1) {
		MarkerItem item0 = (MarkerItem) arg0;
		MarkerItem item1 = (MarkerItem) arg1;
		for (int i = 0; i < fields.length; i++) {
			int value = fields[i].compare(item0, item1);
			if (value == 0)
				continue;
			return value;
		}
		return 0;
	}
}