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.getModuleHandle( ).findParameter( name ) != null )
		{
			return ERROR_MSG_DUPLICATED_NAME;
		}
		return null;
	}
	private void refreshValueTable( )
	{
		if ( valueTable != null && !valueTable.getTable( ).isDisposed( ) )
		{			
			valueTable.refresh( );
			updateTableButtons( );
		}
	}
	private void deleteRow( )
	{
		int index = valueTable.getTable( ).getSelectionIndex( );
		SelectionChoice choice = (SelectionChoice) ( (IStructuredSelection) valueTable.getSelection( ) ).getFirstElement( );
		if ( isDefaultChoice( choice ) )
		{
			defaultValue = null;
		}
		choiceList.remove( choice );
		valueTable.refresh( );
		index--;
		if ( index < 0 && valueTable.getTable( ).getItemCount( ) > 1 )
		{
			index = 0;
		}
		StructuredSelection selection = null;