Bug 190727 [regression]Default value issue when switch report parameter from textbox to listbox.[0705]
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
if ( isStatic( ) )
		{
			String type = getSelectedControlType( );
			if ( !type.equals( lastControlType ) )
			{
				if ( DesignChoiceConstants.PARAM_CONTROL_CHECK_BOX.equals( type ) )
				{
					clearArea( valueArea );
					switchToCheckBox( );
				}
				else if ( PARAM_CONTROL_COMBO.equals( type )
						|| PARAM_CONTROL_LIST.equals( type )
						|| DesignChoiceConstants.PARAM_CONTROL_RADIO_BUTTON.equals( type ) )
				{
					
					if ( !PARAM_CONTROL_COMBO.equals( lastControlType )
							&& !PARAM_CONTROL_LIST.equals( lastControlType )
							&& !DesignChoiceConstants.PARAM_CONTROL_RADIO_BUTTON.equals( lastControlType ) )
					{
						clearArea( valueArea );
						switchToList( );
					}
				}
				else if ( DesignChoiceConstants.PARAM_CONTROL_TEXT_BOX.equals( type ) )
				{
					clearArea( valueArea );
					switchToText( );
				}
				valueArea.layout( );
				initValueArea( );