[PATCH] include: Add _Deref_ret_z_ stub definition.

[Dmitry Timoshkov]

Yet another compatibility fix for Visual Studio 12.0.

Signed-off-by: Dmitry Timoshkov 
---
 include/sal.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/sal.h b/include/sal.h
index c69f7f9840..29746c3a03 100644
--- a/include/sal.h
+++ b/include/sal.h
@@ -34,6 +34,7 @@
 #define _Deref_post_valid_
 #define _Deref_post_z_
 #define _Deref_prepost_opt_z_
+#define _Deref_ret_z_

#define _Field_range_(min, max)