Unstub $langObject

The first time we use $langObject, it's a function call with a parameter
by reference, so it needs to be unstubbed first.

Change-Id: I43cdb0a8b2728d0f69a11fd778c6a3ff03487ef3
(cherry picked from commit b34f264e0c26e8fd0e5d7d128cf80e0081c2ae33)