Allow download ahead even if entry isn't favorited

(cherry picked from commit f8cf3db4a456462a80ecc252e8655f6b5c66c4d4)

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderViewModel.kt

@@ -261,6 +261,7 @@ class ReaderViewModel(
     }
 
     private val incognitoMode = preferences.incognitoMode().get()
+    private val downloadAheadAmount = downloadPreferences.autoDownloadWhileReading().get()
 
     init {
         // To save state
@@ -561,9 +562,8 @@ class ReaderViewModel(
     }
 
     private fun downloadNextChapters() {
+        if (downloadAheadAmount == 0) return
         val manga = manga ?: return
-        val amount = downloadPreferences.autoDownloadWhileReading().get()
-        if (amount == 0 || !manga.favorite) return
 
         // Only download ahead if current + next chapter is already downloaded too to avoid jank
         if (getCurrentChapter()?.pageLoader?.isLocal == true) return
@@ -585,7 +585,7 @@ class ReaderViewModel(
                 } else {
                     this
                 }
-            }.take(amount)
+            }.take(downloadAheadAmount)
 
             downloadManager.downloadChapters(
                 manga,