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-rw-r--r--base/gxdevsop.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/base/gxdevsop.h b/base/gxdevsop.h
index a5af0f41e..479d97798 100644
--- a/base/gxdevsop.h
+++ b/base/gxdevsop.h
@@ -430,6 +430,9 @@ enum {
/* Determine if a given device is a clist one. Returns 1 if it is. */
gxdso_is_clist_device,
+ /* Determine if a given device is a null device. Returns 1 if it is. */
+ gxdso_is_null_device,
+
/* Add new gxdso_ keys above this. */
gxdso_pattern__LAST
};