Prevent displaying an empty membership link.

coin/members/templates/members/detail.html

@@ -86,9 +86,11 @@
                 {% endif %}
             </p>
 
-            <a href="{{ membership_info_url }}" target="_blank" class="button small radius expand">
+            {% if membership_info_url %}
+            <a href="{{ membership_info_url }}" class="button small radius expand">
                 <i class="fa fa-heart"></i> Renouveler ma cotisation
             </a>
+            {% endif %}
         </div>
 
     </div>

coin/settings.py

@@ -235,7 +235,7 @@ MEMBER_DEFAULT_COTISATION = 20
 
 # Link to a page with information on how to become a member or pay the
 # membership fee
-MEMBER_MEMBERSHIP_INFO_URL = '#'
+MEMBER_MEMBERSHIP_INFO_URL = ''
 
 # Reset session if cookie older than 2h.
 SESSION_COOKIE_AGE = 7200