* unit-tests: small updates to tests

src/tests/test-mu-common.h

@@ -1,5 +1,5 @@
 /* 
-** Copyright (C) 2010 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
+** Copyright (C) 2008-2010 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
 **
 ** This program is free software; you can redistribute it and/or modify it
 ** under the terms of the GNU General Public License as published by the
@@ -31,6 +31,8 @@ G_BEGIN_DECLS
  */
 char* test_mu_common_get_random_tmpdir (void);
 
+void black_hole (void);
+
 G_END_DECLS
 
 #endif /*__TEST_MU_COMMON_H__*/