Use C99 designator in the rbtree sentinel definition

This change should improve the code readability.

Discussion: https://postgr.es/m/CAGRrpzYE8-7GCoaPjOiL9T_HY605MRax-2jgTtLq236uksZ1Sw%40mail.gmail.com
Author: Steve Chavez, Alexander Korotkov
Reviewed-by: Alexander Korotkov

diff --git a/src/backend/lib/rbtree.c b/src/backend/lib/rbtree.c
index a9981dbadad05d59967c0b2dec49324a903ae167..e1cc4110bd447d1deb3046276ee40eb9feed7e27 100644 (file)
--- a/src/backend/lib/rbtree.c
+++ b/src/backend/lib/rbtree.c
@@ -62,7 +62,7 @@ struct RBTree
 
 static RBTNode sentinel =
 {
-       RBTBLACK, RBTNIL, RBTNIL, NULL
+       .color = RBTBLACK,.left = RBTNIL,.right = RBTNIL,.parent = NULL
 };