feat: 修复下载bug

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

@@ -93,12 +93,12 @@ class DownloadService : BaseService() {
                 book = bookMap[bookUrl]
                 if (book == null) {
                     book = App.db.bookDao().getBook(bookUrl)
-                }
                     if (book == null) {
                         removeDownload(bookUrl)
                     }
                 }
             }
+        }
         return book
     }
 
@@ -111,12 +111,12 @@ class DownloadService : BaseService() {
                     App.db.bookSourceDao().getBookSource(origin)?.let {
                         webBook = WebBook(it)
                     }
-                }
                     if (webBook == null) {
                         removeDownload(bookUrl)
                     }
                 }
             }
+        }
         return webBook
     }