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
}
				newValue = convertToStandardFormat( newValue );
				if ( containValue( choice, newValue, property ) )
				{
					if ( COLUMN_DISPLAY_TEXT.equals( property ) )
					{
						ExceptionHandler.openMessageBox( ERROR_TITLE_INVALID_INPUT,
								ERROR_MSG_DUPLICATED_LABEL,
								SWT.ICON_INFORMATION );
					}
					else
					{
						ExceptionHandler.openMessageBox( ERROR_TITLE_INVALID_INPUT,
								ERROR_MSG_DUPLICATED_VALUE,
								SWT.ICON_INFORMATION );
					}
					return;
				}
				if ( choice == dummyChoice )
				{
					choice = StructureFactory.createSelectionChoice( );
					choiceList.add( choice );
				}
				if ( COLUMN_VALUE.equals( property ) )
				{
					if ( isDefaultChoice( choice ) )
					{
						defaultValue = newValue;
					}
					choice.setValue( newValue );