perl-module: Add missing "#include"s to PSPP.xs.

Found by clang.
Reported-by: Jeremy Lavergne <jeremy@lavergne.gotdns.org>

diff --git a/perl-module/PSPP.xs b/perl-module/PSPP.xs
index d2b2c58c4c91396ca158d4840e796e468c9635d1..f8479c6da06a641fc5ce8c92a271aa87f25565e2 100644 (file)
--- a/perl-module/PSPP.xs
+++ b/perl-module/PSPP.xs
@@ -1,5 +1,5 @@
 /* PSPP - computes sample statistics.
-   Copyright (C) 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
+   Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
@@ -39,9 +39,11 @@
 #include <data/dictionary.h>
 #include <data/case.h>
 #include <data/casereader.h>
+#include <data/casewriter.h>
 #include <data/variable.h>
 #include <data/attributes.h>
 #include <data/file-handle-def.h>
+#include <data/identifier.h>
 #include <data/sys-file-writer.h>
 #include <data/sys-file-reader.h>
 #include <data/value.h>