Merge pull request #4 from salt-formulas/fix-empty-decoder

LGTM
diff --git a/apache/meta/heka.yml b/apache/meta/heka.yml
index 13a6764..2004b0e 100644
--- a/apache/meta/heka.yml
+++ b/apache/meta/heka.yml
@@ -1,5 +1,5 @@
 {%- from "apache/map.jinja" import server with context %}
-{%- if server.get('enabled', False) and server.site is defined %}
+{%- if server.get('enabled', False) and server.get('site', {}).selectattr("type", "keystone")|length > 0 %}
 
 log_collector:
   decoder: