[Android] Fix media thumbnail deletion crash

[Nicolas Pomepuy]

vlc-android | branch: master | Nicolas Pomepuy <nicolas at videolabs.io> | Fri Sep  1 07:39:05 2023 +0200| [8d639cbe2acc5ceff35fad2ecdcd82156189e1bc] | committer: Duncan McNamara

Fix media thumbnail deletion crash

Fixes #2989

> https://code.videolan.org/videolan/vlc-android/commit/8d639cbe2acc5ceff35fad2ecdcd82156189e1bc
---

 .../vlc-android/src/org/videolan/vlc/viewmodels/CallBackDelegate.kt    | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/application/vlc-android/src/org/videolan/vlc/viewmodels/CallBackDelegate.kt b/application/vlc-android/src/org/videolan/vlc/viewmodels/CallBackDelegate.kt
index ee6b2efb6e..a272d3e21f 100644
--- a/application/vlc-android/src/org/videolan/vlc/viewmodels/CallBackDelegate.kt
+++ b/application/vlc-android/src/org/videolan/vlc/viewmodels/CallBackDelegate.kt
@@ -129,8 +129,7 @@ class CallBackDelegate : ICallBackHandler,
         AppContextProvider.appContext.getExternalFilesDir(null)?.let {
             val file = File(it.absolutePath + Medialibrary.MEDIALIB_FOLDER_NAME + "/$mediaId.jpg")
             if (file.exists()) {
-                val media = medialibrary.getMedia(mediaId)
-                media.removeThumbnail()
+                medialibrary.getMedia(mediaId)?.removeThumbnail()
             }
             FileUtils.deleteFile(file)
         }