Fix panic on verifySigError in fetching missing events
@@ -872,7 +872,7 @@ func (t *txnReq) lookupMissingStateViaStateIDs(ctx context.Context, roomID, even
h, err = t.lookupEvent(ctx, roomVersion, missingEventID, false)
switch err.(type) {
case verifySigError:
- break
+ return
case nil:
break
default:
