Bug 153523 OK button in parameter dialog is enabled without default value in combo-box
Description: OK button in parameter dialog is enabled without default value in combo-box Steps to reproduce: 1. New a report parameter, combo-box. 2. Click New button, input abc as value, click OK 3. Set abc as default value and close Edit Parameter dialog. 4. New a data source and dataset 5. Edit the parameter, remove abc value and import values from dataset Expected result: OK button is disabled for there is no default value. Actual result: OK button is enabled.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
ExceptionHandler.openErrorMessageBox( ERROR_TITLE_INVALID_LIST_LIMIT,
							MessageFormat.format( ERROR_MSG_INVALID_LIST_LIMIT,
									new Object[]{
										Integer.toString( Integer.MAX_VALUE )
									} ) );
				}
			}
			else
			{
				inputParameter.setProperty( ScalarParameterHandle.LIST_LIMIT_PROP,
						null );
			}
		}
		catch ( Exception e )
		{
			ExceptionHandler.handle( e );
			return;
		}
		setResult( inputParameter );
		super.okPressed( );
	}
	private void createLabel( Composite parent, String content )
	{
		Label label = new Label( parent, SWT.NONE );
		if ( content != null )
		{
			label.setText( content );
		}
		setLabelLayoutData( label );
	}