Bug 172606 Error icon in Library Explorer for multi-extends item.[01]
Description: Error icon in Library Explorer for multi-extends item. Build number:2.1.2.v20070202 Steps to reproduce: 1. New a.rptlibrary and b.rptlibrary. 2. New a table in a.rptlibray. 3. Open b.rptlibray and extends table item in a.rptlibray. 4. Open Library Explore, check table item inside b.rptlibrary. Expected result: Normal item icon before table item. Actual result: Error icon indicate the item exists errors. see attached.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
*            the tree viewer
	 * @param element
	 *            the element
	 * 
	 * @return true if the element is on the tree, or false else.
	 */
	public static boolean containElement( AbstractTreeViewer treeViewer,
			Object element )
	{
		ITreeContentProvider provider = (ITreeContentProvider) treeViewer.getContentProvider( );
		Object input = treeViewer.getInput( );
		if ( input instanceof Object[] )
		{
			Object[] inputs = (Object[]) input;
			for ( int i = 0; i < inputs.length; i++ )
			{
				if ( containElement( inputs[i], provider, element ) )
				{
					return true;
				}
			}
			return false;
		}
		return containElement( input, provider, element );
	}
	private static boolean containElement( Object parent,
			ITreeContentProvider provider, Object element )
	{
		if ( parent == null )
		{