be sure to include tinc so we can reference variable ($use_shorewall)

manifests/init.pp

@@ -1,7 +1,7 @@
 # configure base tinc
 class tinc(
-  $use_shorewall = false,
-  $key_source_path  = '/var/lib/puppet/tinc_keys',
+  $use_shorewall   = false,
+  $key_source_path = '/var/lib/puppet/tinc_keys',
 ) {
   if $::operatingsystem == 'CentOS' and $::operatingsystemmajrelease >  6 {
     $uses_systemd = true

manifests/switch.pp

@@ -24,6 +24,7 @@ define tinc::switch(
   }
 
   if $ensure == 'present' {
+    include ::tinc
     require bridge_utils
     $real_tinc_bridge_interface = $tinc_bridge_interface ? {
       'absent'  => "br${name}",