lib/rules nit: missing `static` for a function

diff --git a/lib/rules/api.c b/lib/rules/api.c
index 2725e9a48d60644b314cdaa8a857d8096f5cd648..c4e254502a03b0cecc768d5cf8753237dafdbc63 100644 (file)
--- a/lib/rules/api.c
+++ b/lib/rules/api.c
@@ -865,7 +865,7 @@ static int subnet_encode(const struct sockaddr *addr, int sub_len, uint8_t buf[3
 }
 
 // Is `a` subnet-prefix of `b`?  (a byte format of subnet_encode())
-bool subnet_is_prefix(uint8_t a, uint8_t b)
+static bool subnet_is_prefix(uint8_t a, uint8_t b)
 {
        while (true) {
                if (a >> 6 == 0)