Bug 140542 label can't be displayed without resource file or unmatched key
Steps to reproduce: 1.New a report, add a lable with text "aaa" 2.Add a resource file for the report, set key to "key1", value to "actuate", apply the value to the label 3.Clear the resource file in Property Editor->General->Resource File (or change the key to "abc") 4.Preview the report Expected result: 1.Display label text "aaa" on preview or 2.Give a warning message to say resource file is not found or unmatched key Actual result: Nothing displays on preview
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
return Collections.unmodifiableList( libraries );
		List allLibraries = new ArrayList( libraries );
		Iterator iter = new ArrayList( allLibraries ).iterator( );
		while ( iter.hasNext( ) )
		{
			Library library = (Library) iter.next( );
			allLibraries.addAll( library.getLibraries( newLevel ) );
		}
		return allLibraries;
	}
	/**
	 * Returns only libraries this module includes directly.
	 * 
	 * @return list of libraries.
	 */
	public List getLibraries( )
	{
		return getLibraries( IModuleNameSpace.DIRECTLY_INCLUDED_LEVEL );
	}
	/**
	 * Inserts the library to the given position.
	 * 
	 * @param library
	 *            the library to insert
	 * @param posn
	 *            at which the given library is inserted.
	 */
	public void insertLibrary( Library library, int posn )
	{
		if ( libraries == null )