Bug 191168 [Regression]Exception occurs when resize masterpage in library
Description: Exception occurs when resize masterpage in library. Build number:2.2.0.v20070606-0630 Regression bug:187443 Steps to reproduce: 1. New a library. 2. Go to Master Page, resize the master page using the ruler. Expected result: 1. Layout works correctly. 2. No exception is thrown out. Error log: An unexpected internal exception occurred.Please see log for detail. Plug-in Provider:Eclipse.org Plug-in Name:BIRT Designer UI Plug-in ID:org.eclipse.birt.report.designer.ui Version:2.2.0.v20070606-0630 Error Code:Error.GUIException.invokedByUnexpectedException Error Message:org.eclipse.birt.report.designer.internal.lib.lalyout.LibraryReportDesignLayout
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
*/
	protected int saveState = 0;
	/**
	 * Internal table to store a bunch of user-defined messages. One message can
	 * be defined in several translations, one translation per locale.
	 */
	protected TranslationTable translations = new TranslationTable( );
	/**
	 * The property definition list of all the referencable structure list
	 * property. Each one in the list is instance of <code>IPropertyDefn</code>
	 */
	private HashMap referencableProperties = null;
	/**
	 * Accumulates errors and warnings during a batch operation. Each one is the
	 * instance of <code>Exception</code>.
	 */
	protected List allExceptions = new ArrayList( );
	/**
	 * The validation executor. It performs the semantic validation and sends
	 * validation event to listeners.
	 */
	protected ValidationExecutor validationExecutor = new ValidationExecutor(
			this );
	/**
	 * The listener list for validation event.
	 */
	private List validationListeners = null;
	/**
	 * The file name. Null means that the module has not yet been saved to a
	 * file.