Bug 131243 Open invalid report design.
Open a invalid report design should switch to XML Source editor page and can't switch to other pages, when the source is correct user can switch to layout and other pages.
UI/org.eclipse.birt.report.designer.ui.editors/src/org/eclipse/birt/report/designer/ui/editors/MultiPageReportEditor.java
if ( activeEditor != null )
			{
				ISelectionProvider selectionProvider = activeEditor.getSite( )
						.getSelectionProvider( );
				if ( selectionProvider != null )
					selectionProvider.setSelection( selection );
			}
			else
			{
				this.globalSelection = selection;
				fireSelectionChanged( new SelectionChangedEvent( this,
						globalSelection ) );
			}
		}
	}
	/**
	 * Constructor
	 */
	public MultiPageReportEditor( )
	{
		super( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.forms.editor.FormEditor#init(org.eclipse.ui.IEditorSite,
	 *      org.eclipse.ui.IEditorInput)
	 */
	public void init( IEditorSite site, IEditorInput input )
			throws PartInitException