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
}
	private void switchParamterType( )
	{
		clearArea( valueArea );
		lastControlType = null;
		if ( isStatic( ) )
		{
			switchToStatic( );
		}
		else
		{
			switchToDynamic( );
		}
		buildControlTypeList( getSelectedDataType( ) );
		valueArea.layout( );
		initValueArea( );
		refreshCheckBoxArea( );
	}
	private void switchToCheckBox( )
	{
		createLabel( valueArea, LABEL_DEFAULT_VALUE );
		defaultValueChooser = new Combo( valueArea, SWT.READ_ONLY | SWT.BORDER );
		defaultValueChooser.add( CHOICE_NO_DEFAULT );
		defaultValueChooser.add( BOOLEAN_TRUE );
		defaultValueChooser.add( BOOLEAN_FALSE );
		defaultValueChooser.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		defaultValueChooser.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				switch ( defaultValueChooser.getSelectionIndex( ) )