Update to 7-Zip 17.01 Beta from Igor Pavlov

- Minor speed optimization for LZMA2 (xz and 7z) multi-threading compression.
  7-Zip now uses additional memory buffers for multi-block LZMA2 compression.
  CPU utilization was slightly improved.
- 7-zip now creates multi-block xz archives by default. Block size can be
  specified with -ms[Size]{m|g} switch.
- xz decoder now can unpack random block from multi-block xz archives.  7-Zip
  File Manager now can open nested multi-block xz archives (for example,
  image.iso.xz) without full unpacking of xz archive.
- 7-Zip now can create zip archives from stdin to stdout.
- 7-Zip command line: @listfile now doesn't work after -- switch.  Use
  -i@listfile before -- switch instead.

fixed bugs:
- 7-Zip could add unrequired alternate file streams to WIM archives, for
  commands that contain filename wildcards and -sns switch.
- 7-Zip 17.00 beta crashed for commands that write anti-item to 7z archive.
- 7-Zip 17.00 beta ignored "Use large memory pages" option.

CPP/7zip/UI/Common/ZipRegistry.h

@@ -48,9 +48,14 @@ namespace NCompression
     UString Options;
     UString EncryptionMethod;
 
+    void Reset_BlockLogSize()
+    {
+      BlockLogSize = (UInt32)(Int32)-1;
+    }
+
     void ResetForLevelChange()
     {
-      BlockLogSize = NumThreads = Level = Dictionary = Order = UInt32(-1);
+      BlockLogSize = NumThreads = Level = Dictionary = Order = (UInt32)(Int32)-1;
       Method.Empty();
       // Options.Empty();
       // EncryptionMethod.Empty();