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
* @return the first selected EditPart or root edit part
	 */
	public static EditPart getCurrentEditPart( )
	{
		EditPartViewer viewer = getLayoutEditPartViewer( );
		if ( viewer == null )
			return null;
		IStructuredSelection targets = (IStructuredSelection) viewer.getSelection( );
		if ( targets.isEmpty( ) )
			return null;
		return (EditPart) targets.getFirstElement( );
	}
	/**
	 * Gets EditPartViewer in layout editor.
	 * 
	 * @return the EditPartViewer in layout editor, or null if not found.
	 */
	public static EditPartViewer getLayoutEditPartViewer( )
	{
		IEditorPart part = PlatformUI.getWorkbench( )
				.getActiveWorkbenchWindow( )
				.getActivePage( )
				.getActiveEditor( );
		AbstractMultiPageEditor reportEditor = null;
		if ( part instanceof AbstractMultiPageEditor )
		{
			reportEditor = (AbstractMultiPageEditor) part;
		}
		else if ( part instanceof IReportEditor )
		{