confusing logical-and with bitwise-and in scan_v3.cpp

[kidmin]

Maybe the mistake has been corrected in later versions, but...

https://github.com/JPCERTCC/EmoCheck/blob/58677d7c0bafe4ef7c7e2d355aa34b10a958a590/emocheck/modules/scan_v3.cpp#L22

The & (bitwise-and) should be && (logical-and) in the context.