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
return (SharedStyleHandle) style.getHandle( module );
	}
	/**
	 * Sets the name of the shared style for this element.
	 * 
	 * @param name
	 *            the name of the shared style. If <code>null</code>, then
	 *            the shared style name is cleared.
	 * @throws StyleException
	 *             If the name is not valid, or if this element does not support
	 *             a style.
	 * 
	 * @see #getStyle()
	 */
	public void setStyleName( String name ) throws StyleException
	{
		DesignElement element = getElement( );
		StyleCommand cmd = new StyleCommand( module, element );
		cmd.setStyle( name );
	}
	/**
	 * Sets the shared style element for this element.
	 * 
	 * @param obj
	 *            the shared style. If <code>null</code>, then the shared
	 *            style is cleared.
	 * @throws StyleException
	 *             If this element does not support a style.
	 * @see #getStyle()
	 *