Unzip: Dummy file is created when password is invalid

[Lecrapouille]

@fbergmann

• Let supposed foo.zip has "1234" as password.
• Let try opening it with "abcd" password and try to extract all its entries.
• unzOpenCurrentFilePassword with "abcd" password does not return KO
• std::ofstream output_file(filename.c_str(), std::ofstream::binary); The file of the entry is created with some bytes inside (because set as binary ?)
• unzReadCurrentFile will return 0 bytes read (instead of negative value for error).
• extractToXXX is returning OK
• unzCloseCurrentFile is returning KO
• ofstream file is still present.

[Lecrapouille]

Get segfault with macOS when dezziping https://www.unforgettable.dk/ with dummy password