Trim/discard fixes

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/iolog.h b/iolog.h
index c59e6aa..c35ce1e 100644
--- a/iolog.h
+++ b/iolog.h
@@ -53,7 +53,7 @@
 	};
 	unsigned long long offset;
 	unsigned long len;
-	unsigned long flags;
+	unsigned int flags;
 	enum fio_ddir ddir;
 	union {
 		unsigned long delay;