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
List libs = (List) getLocalProperty( this, LIBRARIES_PROP );
		if ( libs == null )
			return Collections.EMPTY_LIST;
		return Collections.unmodifiableList( libs );
	}
	/**
	 * Gets the default units for the design.
	 * 
	 * @return the default units used in the design
	 */
	public String getUnits( )
	{
		if ( !StringUtil.isBlank( units ) )
			return units;
		return (String) getPropertyDefn( UNITS_PROP ).getDefault( );
	}
	/**
	 * Gets a list containing all the include scripts.
	 * 
	 * @return a list containing all the include scripts. Return
	 *         <code>null</code> if there were no scripts defined.
	 */
	public List getIncludeScripts( )
	{
		return (ArrayList) getLocalProperty( this, INCLUDE_SCRIPTS_PROP );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.core.DesignElement#getIntrinsicProperty(java.lang.String)