Another fix for clamav

wo/cli/plugins/stack_pref.py

@@ -1163,9 +1163,10 @@ def post_pref(self, apt_packages, packages, upgrade=False):
                                   'redis', 'redis', recursive=False)
                 WOService.restart_service(self, 'redis-server')
 
-        # Redis configuration
-        if set(["clamav"]).issubset(set(apt_packages)):
+        # ClamAV configuration
+        if set(WOVariables.wo_clamav).issubset(set(apt_packages)):
             Log.debug("Setting up freshclam cronjob")
+            if not os.path.isfile("/opt/freshclam.sh"):
                 WOTemplate.render(self, '/opt/freshclam.sh',
                                   'freshclam.mustache',
                                   data, overwrite=False)