ctx: Add missing #include <limits.h>

Spotted at https://github.com/freebsd/freebsd-ports/commit/4d80040cb4c10271b375f3b5d70d2b29dae7fc6f

1 files changed, 1 insertions, 0 deletions

diff --git a/ctx.c b/ctx.c
index 6fc6ffb..2fc7cb1 100644
--- a/ctx.c
+++ b/ctx.c
@@ -23,6 +23,7 @@
 #include "trie.h"
 #include <assert.h>
 #include <errno.h>
+#include <limits.h>
 #include <stdlib.h>
 
 struct bfs_ctx *bfs_ctx_new(void) {