verify: verify bytes should not add to this_io_bytes

When rw=readwrite,verify+backlog, the verify are treated as normal
read, and bytes are added to this_io_bytes, cause fio terminate early.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/io_u.c b/io_u.c
index a4f378d..6646332 100644
--- a/io_u.c
+++ b/io_u.c
@@ -1381,7 +1381,9 @@
 		td->io_blocks[idx]++;
 		td->this_io_blocks[idx]++;
 		td->io_bytes[idx] += bytes;
-		td->this_io_bytes[idx] += bytes;
+
+		if (!(io_u->flags & IO_U_F_VER_LIST))
+			td->this_io_bytes[idx] += bytes;
 
 		if (idx == DDIR_WRITE) {
 			f = io_u->file;