Fix a crash when a given media item is not found

Fixes: 138455442
Test: manual
Change-Id: Ib71832a8d04ed721f779a1505332684aa7d11342

1 files changed, 1 insertions, 1 deletions

diff --git a/TestMediaApp/src/com/android/car/media/testmediaapp/TmaLibrary.java b/TestMediaApp/src/com/android/car/media/testmediaapp/TmaLibrary.java
index d67f157..eb77019 100644
--- a/TestMediaApp/src/com/android/car/media/testmediaapp/TmaLibrary.java
+++ b/TestMediaApp/src/com/android/car/media/testmediaapp/TmaLibrary.java
@@ -63,7 +63,7 @@ class TmaLibrary {
     TmaMediaItem getMediaItemById(String mediaId) {
         TmaMediaItem result = mMediaItemsByMediaId.get(mediaId);
         // Processing includes only on request allows recursive structures :-)
-        if (!TextUtils.isEmpty(result.mInclude)) {
+        if (result != null && !TextUtils.isEmpty(result.mInclude)) {
             result = result.append(loadAssetFile(result.mInclude).mChildren);
         }
         return result;