Bug 146796 Error message pop up if display text contain non-digital char when add next item
Description: In decimal type parameter creation,display type is "list box", Error message pop up if "display text" contain non-digital char when add next item. Steps: 1.Create a new decimal parameter 2.Set display type as "list box" 3.Input one item: value:1, display text:test 4.Input another item: Value:2 Actual result: error message pop up: The display text already exists! Expected result: Input item succussfully.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
if ( isValidValue( defaultValue ) != null )
				{
					defaultValue = null;
					defaultValueChooser.select( 0 );
				}
				else
				{
					if ( Boolean.valueOf( defaultValue ).booleanValue( ) )
					{
						defaultValueChooser.select( 1 );
					}
					else
					{
						defaultValueChooser.select( 2 );
					}
				}
			}
			else
			{
				if ( DesignChoiceConstants.PARAM_CONTROL_TEXT_BOX.equals( getSelectedControlType( ) )
						&& defaultValue != null )
				{
					defaultValueEditor.setText( defaultValue );
				}
			}
			refreshValueTable( );
		}
		else
		{
			refreshDataSets( );