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
while ( iter.hasNext( ) )
			{
				IAttributeListener listener = (IAttributeListener) iter.next( );
				listener.fileNameChanged( (ModuleHandle) getHandle( this ),
						event );
			}
		}
	}
	/**
	 * Adds one dispose listener. The duplicate listener will not be added.
	 * 
	 * @param listener
	 *            the dispose listener to add
	 */
	public void addDisposeListener( IDisposeListener listener )
	{
		if ( disposeListeners == null )
			disposeListeners = new ArrayList( );
		if ( !disposeListeners.contains( listener ) )
			disposeListeners.add( listener );
	}
	/**
	 * Removes one dispose listener. If the listener not registered, then the
	 * request is silently ignored.
	 * 
	 * @param listener
	 *            the dispose listener to remove
	 * @return <code>true</code> if <code>listener</code> is successfully
	 *         removed. Otherwise <code>false</code>.
	 *