drm_hwcomposer: Fix comment on worker_test

Reflect the boolean logic of the accompanying code, which is run after
Worker.InitWorker() has completed in test setup.

Signed-off-by: Rhys Kidd <rhyskidd@gmail.com>
Signed-off-by: Robert Foss <robert.foss@collabora.com>
diff --git a/tests/worker_test.cpp b/tests/worker_test.cpp
index 38f91db..82523f0 100644
--- a/tests/worker_test.cpp
+++ b/tests/worker_test.cpp
@@ -66,7 +66,7 @@
 };
 
 TEST_F(WorkerTest, test_worker) {
-  // already isInitialized so should fail
+  // already isInitialized so should succeed
   ASSERT_TRUE(worker.initialized());
 
   int val = worker.value;