Fix #265: show sidebar on post/comment pages.

Logic already existed for this and is operative on the upstream.
However, it was restricted to only show sidebars for posts inside
subs ("holes"). We simply remove that check so it works on posts
without a sub set, namely all of the ones on TheMotte.

files/templates/default.html

@@ -257,7 +257,7 @@
 
 		</div>
 		{% block sidebar %}
-			{% if home or sub and p %}
+			{% if home or p %}
 				{% include "sidebar_" + SITE_ID + ".html" %}
 			{% endif %}
 		{% endblock %}