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
* <p>
	 * Note a key difference between this method and the
	 * <code>getStyle( )</code> method. This method returns a handle to the
	 * <em>this</em> element. The <code>getStyle( )</code> method returns a
	 * handle to the shared style, if any, that this element references.
	 * 
	 * @return a style handle to work with the style properties of this element.
	 *         Returns <code>null</code> if this element does not have style
	 *         properties.
	 */
	public StyleHandle getPrivateStyle( )
	{
		if ( getDefn( ).hasStyle( ) )
			return new PrivateStyleHandle( module, getElement( ) );
		return null;
	}
	/**
	 * Returns the name of this element. Returns <code>null</code> if the
	 * element does not have a name. Many elements do not require a name. The
	 * name does not inherit. If this element does not have a name, it will not
	 * inherit the name of its parent element.
	 * 
	 * @return the element name, or null if the name is not set
	 */
	public String getName( )
	{
		return getElement( ).getName( );
	}
	/**
	 * Gets the name of this element. The returned element name will be the same