BUG/MEDIUM: cli/ssl: don't store base64dec() result in the trash's length

By convenience or laziness we used to store base64dec()'s return code
into trash.data and to compare it against 0 to check for conversion
failure, but it's now unsigned since commit 843b7cb ("MEDIUM: chunks:
make the chunk struct's fields match the buffer struct"). Let's clean
this up and test the result itself without storing it first.

No backport is needed.
1 file changed