Add DL_EXPORT() to all modules that could possibly be used
on BeOS or Windows.
diff --git a/Modules/rgbimgmodule.c b/Modules/rgbimgmodule.c
index 94b055d..cc5c6d5 100644
--- a/Modules/rgbimgmodule.c
+++ b/Modules/rgbimgmodule.c
@@ -788,7 +788,7 @@
 };
 
 
-void
+DL_EXPORT(void)
 initrgbimg()
 {
 	PyObject *m, *d;