Cleanup verify headers

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/io_u.c b/io_u.c
index d12f370..5cf2526 100644
--- a/io_u.c
+++ b/io_u.c
@@ -7,6 +7,7 @@
 
 #include "fio.h"
 #include "hash.h"
+#include "verify.h"
 
 struct io_completion_data {
 	int nr;				/* input */