Merge pull request #1608 from Xwite/master

fix bugs

app/src/main/java/io/legado/app/service/CheckSourceService.kt

@@ -164,7 +164,7 @@ class CheckSourceService : BaseService() {
                         }
                     } else {
                         source.removeGroup("发现失效")
-                        books = exploreBooks
+                        if (books.isEmpty()) books = exploreBooks
                     }
                 }
             }

app/src/main/java/io/legado/app/ui/book/read/config/ReadAloudConfigDialog.kt

@@ -108,7 +108,6 @@ class ReadAloudConfigDialog : DialogFragment() {
                         postEvent(EventBus.MEDIA_BUTTON, false)
                     }
                 }
-                PreferKey.ttsEngine -> upSpeakEngineSummary()
             }
         }