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
{
				inputParameter.setProperty( ScalarParameterHandle.MUCH_MATCH_PROP,
						null );
			}
			
			inputParameter.setControlType( newControlType );
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			inputParameter.setDefaultValue( defaultValue );
			
			
			inputParameter.setDataType( dataType.findChoiceByDisplayName( dataTypeChooser.getText( ) )
					.getName( ) );
			
			PropertyHandle selectionChioceList = inputParameter.getPropertyHandle( ScalarParameterHandle.SELECTION_LIST_PROP );
			selectionChioceList.setValue( null );
			if ( isStatic( ) )
			{