bugfix: allow the module to work with python compiled without thread support.
closes sourceforge pybsddb bug id 669533.
diff --git a/Modules/_bsddb.c b/Modules/_bsddb.c
index 8b93af3..9561d28 100644
--- a/Modules/_bsddb.c
+++ b/Modules/_bsddb.c
@@ -1072,7 +1072,9 @@
      * threads have already been initialized.
      *  (see pybsddb-users mailing list post on 2002-08-07)
      */
+#ifdef WITH_THREAD
     PyEval_InitThreads();
+#endif
     MYDB_BEGIN_ALLOW_THREADS;
 #if (DBVER >= 41)
     err = self->db->associate(self->db,