Add DL_EXPORT() to all modules that could possibly be used
on BeOS or Windows.
diff --git a/Modules/dbmmodule.c b/Modules/dbmmodule.c
index ea628f1..7a234a2 100644
--- a/Modules/dbmmodule.c
+++ b/Modules/dbmmodule.c
@@ -311,7 +311,7 @@
 	{ 0, 0 },
 };
 
-void
+DL_EXPORT(void)
 initdbm() {
 	PyObject *m, *d;