Fix UninitializedPropertyAccessException when deferredGrant is not initialized

application/vlc-android/src/org/videolan/vlc/gui/helpers/hf/BaseHeadlessFragment.kt

@@ -63,6 +63,10 @@ class PermissionViewmodel : ViewModel() {
     val isCompleted : Boolean
         get() = ::deferredGrant.isInitialized && deferredGrant.isCompleted
 
+    fun complete(value:Boolean) {
+        if (::deferredGrant.isInitialized) deferredGrant.complete(value)
+    }
+
     fun setupDeferred() {
         deferredGrant = CompletableDeferred<Boolean>().apply {
             invokeOnCompletion { permissionRationaleShown = false }

application/vlc-android/src/org/videolan/vlc/gui/helpers/hf/StoragePermissionsDelegate.kt

@@ -115,7 +115,7 @@ class StoragePermissionsDelegate : BaseHeadlessFragment() {
                     if(activity == null) return@registerForActivityResult
                     if (isGranted || isExternalStorageManager()) {
                         storageAccessGranted.value = true
-                        model.deferredGrant.complete(true)
+                        model.complete(true)
                         exit()
                         return@registerForActivityResult
                     }