[gtksourceview] Fix compilation warning on Windows

[Sébastien Wilmet <swilmet src gnome org>]

commit 02e3120104c24e7c0a3462682d34c61bf999c6e1
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Tue Mar 24 19:49:55 2015 +0100

    Fix compilation warning on Windows

 tests/test-file-saver.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/tests/test-file-saver.c b/tests/test-file-saver.c
index b37a875..dc356ae 100644
--- a/tests/test-file-saver.c
+++ b/tests/test-file-saver.c
@@ -644,11 +644,15 @@ static void
 all_tests (void)
 {
        gboolean have_unowned;
+#ifndef G_OS_WIN32
        gboolean have_unowned_group;
+#endif
 
        g_printf ("\n***\n");
        have_unowned = check_unowned_directory ();
+#ifndef G_OS_WIN32
        have_unowned_group = check_unowned_group ();
+#endif
        g_printf ("***\n\n");
 
        g_test_trap_subprocess ("/file-saver/subprocess/local",