Bug 246105 [Dialogs] Title and description not layed out properly when title image is null
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/TitleAreaDialog.java
break;
			case IMessageProvider.WARNING:
				newImage = JFaceResources.getImage(DLG_IMG_MESSAGE_WARNING);
				break;
			case IMessageProvider.ERROR:
				newImage = JFaceResources.getImage(DLG_IMG_MESSAGE_ERROR);
				break;
			}
		}
		showMessage(newMessage, newImage);
	}
	/**
	 * Show the new message and image.
	 * 
	 * @param newMessage
	 * @param newImage
	 */
	private void showMessage(String newMessage, Image newImage) {
		
		if (message.equals(newMessage) && messageImage == newImage) {
			return;
		}
		message = newMessage;
		if (message == null)
			message = "";
		
		
		String shownMessage = (newImage == null) ? message : " " + message;   
		messageImage = newImage;
		if (!showingError) {