Fix EH gallery updater crashing

app/src/main/java/exh/eh/EHentaiUpdateWorker.kt

@@ -231,9 +231,11 @@ class EHentaiUpdateWorker: JobService(), CoroutineScope {
                     )
             )
 
+            if(updatedManga.isNotEmpty()) {
                 updateNotifier.showResultNotification(updatedManga)
             }
         }
+    }
 
     suspend fun updateEntryAndGetChapters(manga: Manga): List<Chapter> {
         val source = sourceManager.get(manga.source) as? EHentai