Deal with case where server.enabled is undefined
diff --git a/memcached/meta/collectd.yml b/memcached/meta/collectd.yml
index 27078ad..654eb6c 100644
--- a/memcached/meta/collectd.yml
+++ b/memcached/meta/collectd.yml
@@ -1,5 +1,5 @@
 {%- from "memcached/map.jinja" import server with context %}
-{%- if server.enabled %}
+{%- if server.get('enabled', False) %}
 local_plugin:
   memcached:
     template: memcached/files/collectd_memcached.conf