make dns_rbt_zero_header static

diff --git a/lib/dns/rbt.c b/lib/dns/rbt.c
index f3e0a09529ad695b6ad300810c543ac6e08e25b3..199375115e3a33fe22d7f1fab819843e71c018f4 100644 (file)
--- a/lib/dns/rbt.c
+++ b/lib/dns/rbt.c
@@ -360,7 +360,7 @@ printnodename(dns_rbtnode_t *node);
 static void
 freenode(dns_rbt_t *rbt, dns_rbtnode_t **nodep);
 
-isc_result_t
+static isc_result_t
 dns_rbt_zero_header(FILE *file) {
        /*
         * Write out a zeroed header as a placeholder.  Doing this ensures