Add DL_EXPORT() to all modules that could possibly be used
on BeOS or Windows.
diff --git a/Modules/rotormodule.c b/Modules/rotormodule.c
index 5c7d582..b3511d8 100644
--- a/Modules/rotormodule.c
+++ b/Modules/rotormodule.c
@@ -655,7 +655,7 @@
 };
 
 
-void
+DL_EXPORT(void)
 initrotor()
 {
 	(void)Py_InitModule("rotor", rotor_methods);