Add DL_EXPORT() to all modules that could possibly be used
on BeOS or Windows.
diff --git a/Modules/imageop.c b/Modules/imageop.c
index 7b82e04..5572c9f 100644
--- a/Modules/imageop.c
+++ b/Modules/imageop.c
@@ -758,7 +758,7 @@
 };
 
 
-void
+DL_EXPORT(void)
 initimageop()
 {
 	PyObject *m, *d;