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
* 
	 * @param namespace
	 *            the module namespace
	 * @return the module with the given namespace
	 */
	public Library getLibraryWithNamespace( String namespace )
	{
		return getLibraryWithNamespace( namespace,
				IAccessControl.ARBITARY_LEVEL );
	}
	/**
	 * Returns the module with the given namespace. This method checks the
	 * namespace in included libraries within the given depth.
	 * 
	 * @param namespace
	 *            the module namespace
	 * @param level
	 *            the depth of the library
	 * @return the module with the given namespace
	 * 
	 * @see IModuleNameScope
	 */
	public Library getLibraryWithNamespace( String namespace, int level )
	{
		if ( libraries == null )
			return null;
		List list = getLibraries( level );
		Iterator iter = list.iterator( );
		while ( iter.hasNext( ) )
		{