Don't mention hotel perk without hours set

Allows us to remove this text from the Stock "review your shifts worked" email.

Author: kitsuta

uber/templates/emails/shifts/shifts_worked.html

@@ -14,7 +14,7 @@
 
 <br/><br/>We have you down as having worked {{ attendee.unweighted_worked_hours }} actual hours, for a weighted total of {{ attendee.worked_hours }} hours. If that number doesn't sound right, check the schedule below. It shows which shifts were marked as worked, and which ones weren't. If any of them are in error, please let us know so we can work to rectify them!
 
-{% if c.HOTELS_ENABLED %}<br/><br/>Remember, if you don't have at least {{ c.HOURS_FOR_REFUND }} weighted hours, you won't be eligible for a staff badge or hotel space for {{ c.EVENT_NAME }} {{ c.EPOCH|datetime_local("%Y")|int + 1 }}. If you don't have {{ c.HOURS_FOR_HOTEL_SPACE }} weighted hours and claimed hotel space this year, we will also be reviewing your eligibility for next event.{% endif %}
+{% if c.HOTELS_ENABLED and c.HOURS_FOR_HOTEL_SPACE %}<br/><br/>Remember, if you don't have at least {{ c.HOURS_FOR_REFUND }} weighted hours, you won't be eligible for a staff badge or hotel space for {{ c.EVENT_NAME }} {{ c.EPOCH|datetime_local("%Y")|int + 1 }}. If you don't have {{ c.HOURS_FOR_HOTEL_SPACE }} weighted hours and claimed hotel space this year, we will also be reviewing your eligibility for next event.{% endif %}
 
 <br/><br/>If you have any issues with the shifts listed, please contact us before the end of the month so that we can fix any issues that could impact your ability to staff{% if c.HOTELS_ENABLED %} or request hotel space{% endif %} next year.