Bug 142432 MasterPage from library can't be restored to modify
Details: MasterPage from library can't be restored to modify Step: 1.New a library named lib1, and insert a masterpage named lib-mp. 2.Publish the library into resource folder. 3.New a report design and use lib1. 4.Drop the lib-mp from library explorer into outline of report design. 5.Double click lib-mp, and switch to Property editro tab. 6.Click restore. Actual result: Pop up an error message and said that the master page cannot specify size the page type is not custom.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/DesignElementHandle.java
* 
	 * @param propName
	 *            the name of the property
	 * @return the value as a boolean
	 */
	public boolean getBooleanProperty( String propName )
	{
		return getElement( ).getBooleanProperty( module, propName );
	}
	/**
	 * Returns the value of a property as an integer.
	 * 
	 * @param propName
	 *            the name of the property.
	 * @return the value as an integer. Return 0 if the value cannot be
	 *         converted to an integer.
	 */
	public int getIntProperty( String propName )
	{
		return getElement( ).getIntProperty( module, propName );
	}
	/**
	 * Returns the value of a property as a double.
	 * 
	 * @param propName
	 *            the name of the property.
	 * @return the value as a double. Returns <code>null</code> if the value
	 *         cannot be converted to a double.
	 */
	public double getFloatProperty( String propName )