TBR syncbase: tiny bugfix

Fix bug introduced at the last moment before submitting
CL 12161. I must've forgotten to run the tests one last
time.

Change-Id: Ie5deaa928895239d87224ef06159c75676a82814
diff --git a/v23/syncbase/nosql/client_test.go b/v23/syncbase/nosql/client_test.go
index 130f96c..77d565e 100644
--- a/v23/syncbase/nosql/client_test.go
+++ b/v23/syncbase/nosql/client_test.go
@@ -119,7 +119,7 @@
 	for it.Advance() {
 		gotKey := it.Key()
 		gotKeys = append(gotKeys, gotKey)
-		i := len(gotKeys)
+		i := len(gotKeys) - 1
 		if i >= len(wantKeys) {
 			continue
 		}