fix(ModModpack): 初始值不为 0

Plain Craft Launcher 2/Modules/Minecraft/ModModpack.vb

@@ -113,9 +113,10 @@ Public Module ModModpack
         '解压文件
         Dim RetryCount As Integer = 1
         Dim Encode = Encoding.GetEncoding("GB18030")
+        Dim InitialProgress = Loader.Progress
         Try
 Retry:
-            Loader.Progress = 0
+            Loader.Progress = InitialProgress
             '完全不知道为啥会出现文件正在被另一进程使用的问题，总之多试试
             DeleteDirectory(InstallTemp)
             ExtractFile(FileAddress, InstallTemp, Encode, ProgressIncrementHandler:=Sub(Delta) Loader.Progress += Delta * LoaderProgressDelta)