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
}
	/**
	 * Implementation of adding a symbol to a name space. Adds the name only if
	 * it is not null and it has container. This means that we can modify the
	 * element name as will if it's not attached on other elements, and the name
	 * is saved in name space only after the element is added to a slot of the
	 * container.
	 */
	private void addSymbol( )
	{
		if ( element.getName( ) == null )
			return;
		
		
		if ( !element.isManagedByNameSpace( ) )
			return;
		assert element.getRoot( ) != null;
		int ns = ( (ElementDefn) element.getDefn( ) ).getNameSpaceID( );
		
		
		
		
		
		DesignElement existedElement = getModule( ).getNameSpace( ns )
				.getElement( element.getName( ) );
		assert existedElement == null;
		if ( existedElement == null )
			getActivityStack( ).execute(
					new NameSpaceRecord( getModule( ), ns, element, true ) );
	}