* use unsigned in bitwise operator

* use unsigned in bitwise operator

* Revert "fix"

This reverts commit 51aa8940.

* check sizeof deckBuffer in LoadDeck

* clear current_deck when selecting a wrong file

* use local var in ServerEchoRead, ClientRead

* zero init in GetResponse

This reverts commit 51aa8940.

* verify the source of BufferIO::CopyWStr

* add BufferIO::NullTerminate

* use MAX_STRING_ID

* use constant

* use constant