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
/**
	 * Sets the value of a property from a generic object. The value can be any
	 * of the supported types: String, Double, Integer, BigDecimal or one of the
	 * specialized property types. The type of object allowed depends on the
	 * type of the property.
	 * 
	 * @param propName
	 *            the property name
	 * @param value
	 *            the value to set
	 * @throws SemanticException
	 *             if the property is undefined on the element or the value is
	 *             invalid.
	 */
	public void setProperty( String propName, Object value )
			throws SemanticException
	{
		
		DesignElement element = getElement( );
		PropertyCommand cmd = new PropertyCommand( module, element );
		cmd.setProperty( propName, value );
	}
	/**
	 * Sets the value of a property to an integer.
	 * 
	 * @param propName
	 *            the property name
	 * @param value
	 *            the value to set
	 * @throws SemanticException