syslog: Correct rsyslog preferences file resource name

manifests/syslog/config/rsyslog.pp

@@ -53,7 +53,7 @@ define base::syslog::config::rsyslog(
               fail('rsyslog v7 not supported on squeeze')
             }
             'wheezy': {
-              file { '/etc/apt/preferences.d':
+              file { '/etc/apt/preferences.d/rsyslog':
                 ensure => present,
                 source => 'puppet:///modules/base/syslog/etc/apt/preferences.d/rsyslog-wheezy',
               }