Make sure that an invalid url error generates output as well as
stopping processing.

diff --git a/perl/lib/Wallet/Object/File.pm b/perl/lib/Wallet/Object/File.pm
index e892589..e676759 100644
--- a/perl/lib/Wallet/Object/File.pm
+++ b/perl/lib/Wallet/Object/File.pm
@@ -118,8 +118,7 @@ sub _get_crypt_key {
     my $url = $Wallet::Config::LDAP_SECRET;
     $url =~ s{^ldap:///}{}xmsi;
     if ($url eq $Wallet::Config::LDAP_SECRET) {
-        self->error("ERROR: Invalid LDAP URL $url");
-        exit 1;
+        die("ERROR: Invalid LDAP URL $url");
     }
     my @parts = split /\?/, $url;
     my $base   = $parts[0];