Bug 339347 [Markers] Can't toggle item limits in Problems view any more without losing limit
I20110308-2000 I can't toggle item limits in Problems view any more without losing limits. After I've disabled the limits, the next time I enable limits, the value is "1". The stored value should not be changed.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerCategory.java
* (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.views.markers.MarkerSupportItem#getParent()
	 */
	MarkerSupportItem getParent() {
		return null;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.views.markers.MarkerSupportItem#isConcrete()
	 */
	boolean isConcrete() {
		return false;
	}
	/**
	 * Clear the cached values for performance reasons.
	 */
	void clearCache() {
		MarkerSupportItem[] entries = getChildren();
		for (int i = 0; i < entries.length; i++) {
			entries[i].clearCache();
		}
	}
	/* (non-Javadoc)
	 * @see java.lang.Object#hashCode()
	 */
	public int hashCode() {
		final int prime = 31;
		int result = 1;