Thanks for the patch!

By the way, if anyone wants to play WITH the security door code properly working:

open the "maniac.ini" in the installation folder and insert:

For the Enhanced version (it only works with the patch above):

[maniac]
copy_protection=true

For the Original version (it works with GOG's unaltered files):

[maniaco]
copy_protection=true

The other solution is to use Aaron Giles Dreamm emulator. It will not only "uncrack" SCUMM games but also reinsert manual-based copy-protection with on-screen answers! And will reconstruct .exe files for titles that are missing them. Great stuff!