Include what I use

Thanks to https://github.com/include-what-you-use/include-what-you-use

1 files changed, 1 insertions, 1 deletions

diff --git a/opt.h b/opt.h
index a30cd17..5f8180d 100644
--- a/opt.h
+++ b/opt.h
@@ -21,7 +21,7 @@
 #ifndef BFS_OPT_H
 #define BFS_OPT_H
 
-#include "ctx.h"
+struct bfs_ctx;
 
 /**
  * Apply optimizations to the command line.