Improved solution to current_shortstatehash > next_batch. (59b62b1)

`current_shortstatehash` is now calculated from timeline which is already
upper-bound by the `next_batch` snapshot. Previously `current_shortstatehash`
was truly current and had to be disallowed from exceeding `next_batch` by
ignoring the room during sync until a future pass when these values finally
met that condition.

Signed-off-by: Jason Volk <jason@zemos.net>

src/api/client/sync/v5.rs

@@ -422,7 +422,7 @@ where
 
 			(timeline_pdus, limited) = (Vec::new(), true);
 		} else {
-			(timeline_pdus, limited) = match load_timeline(
+			(timeline_pdus, limited, _) = match load_timeline(
 				services,
 				sender_user,
 				room_id,