Skipped uninstantiated DownloadControllers in MediaController.cleanup loop.

Author: 23rd

TMessagesProj/src/main/java/org/telegram/messenger/DownloadController.java

@@ -257,6 +257,10 @@ public static DownloadController getInstance(int num) {
         return localInstance;
     }
 
+    public static boolean hasInstance(int num) {
+        return Instance[num] != null;
+    }
+
     public DownloadController(int instance) {
         super(instance);
         SharedPreferences preferences = MessagesController.getMainSettings(currentAccount);

TMessagesProj/src/main/java/org/telegram/messenger/MediaController.java

@@ -1628,6 +1628,9 @@ public void cleanup() {
         audioInfo = null;
         playMusicAgain = false;
         for (int a = 0; a < UserConfig.MAX_ACCOUNT_COUNT; a++) {
+            if (!DownloadController.hasInstance(a)) {
+                continue;
+            }
             DownloadController.getInstance(a).cleanup();
         }
         videoConvertQueue.clear();