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
*/
	public DesignElement findPage( String name )
	{
		return resolveNativeElement( name, PAGE_NAME_SPACE );
	}
	/**
	 * Finds a parameter by name in this module and the included modules.
	 * 
	 * @param name
	 *            The parameter name.
	 * @return The parameter, if found, otherwise null.
	 */
	public DesignElement findParameter( String name )
	{
		return resolveNativeElement( name, PARAMETER_NAME_SPACE );
	}
	/**
	 * Finds a cube element by name in this module and the included modules.
	 * 
	 * @param name
	 *            the element name
	 * @return the cube element, if found, otherwise null
	 */
	public DesignElement findOLAPElement( String name )
	{
		return resolveNativeElement( name, CUBE_NAME_SPACE );
	}
	/**
	 * Finds a level element by name in this module and the included modules.
	 *