Add const qualifiers where they are accidentally cast away

This only produces warnings under -Wcast-qual, but it's more correct
and consistent in any case.

2 files changed, 3 insertions, 3 deletions

diff --git a/contrib/intarray/_intbig_gist.c b/contrib/intarray/_intbig_gist.c
index eb8f2826349..c6b00eaeff0 100644
--- a/contrib/intarray/_intbig_gist.c
+++ b/contrib/intarray/_intbig_gist.c
@@ -332,7 +332,7 @@ typedef struct
 static int
 comparecost(const void *a, const void *b)
 {
-	return ((SPLITCOST *) a)->cost - ((SPLITCOST *) b)->cost;
+	return ((const SPLITCOST *) a)->cost - ((const SPLITCOST *) b)->cost;
 }
 
 
diff --git a/contrib/ltree/ltree_gist.c b/contrib/ltree/ltree_gist.c
index 1c0fa88c3af..13d96656d2e 100644
--- a/contrib/ltree/ltree_gist.c
+++ b/contrib/ltree/ltree_gist.c
@@ -275,8 +275,8 @@ static int
 treekey_cmp(const void *a, const void *b)
 {
 	return ltree_compare(
-						 ((RIX *) a)->r,
-						 ((RIX *) b)->r
+						 ((const RIX *) a)->r,
+						 ((const RIX *) b)->r
 		);
 }