avoid exit code with no Casks are installed

and no argument is give to `brew cask list`.  Fixes #3881.
Add Cryptol
Texshop: Fix SHA-2
Merge pull request #4048 from NanoXD/master

Texshop: Fix SHA-2
Tagoman: Fix SHA
Merge pull request #4049 from NanoXD/master

Tagoman: Fix SHA
Tactor: Fix shasum
StrongVPN Client: Fix shasum
Merge pull request #4050 from NanoXD/master

Tactor: Fix shasum
SimpleComic: Fix checksum
Sharetool: Fix checksum
Praat: Fix 32-bit app checksum
Orange: Fix checksum
MP4 Tools: Fix checksum
Ltspice: Fix checksum
Lincastor: Fix checksum
Java: Fix checksum
Golly: Fix checksum
Flightgear: Fix checksum
Fender Amp Drivers: Fix checksum