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/command/NameCommand.java
checkName( name );
		
		ActivityStack stack = getActivityStack( );
		NameRecord rename = new NameRecord( element, name );
		stack.startTrans( rename.getLabel( ) );
		
		
		stack.execute( rename );
		
		renameSymbolFrom( oldName );
		stack.commit( );
	}
	/**
	 * Checks the current element name. Done when adding a newly created element
	 * where the element name is already set on the new element.
	 * 
	 * @param name
	 *            the name to check.
	 * @throws NameException
	 *             if the element name is not allowed to change.
	 */
	private void checkName( String name ) throws NameException
	{
		ElementDefn metaData = (ElementDefn) element.getDefn( );
		if ( name == null )
		{
			
			
			if ( element.hasDerived( ) || element.hasReferences( ) )
				throw new NameException( element, name,