False error message: The second parameter must be an `out' value parameter for attribute `prototype(backtrack)' instead of `inout' value parameter
## Summary
The -Y compiler switch produces invalid compilation error
## Steps and/or TTCN-3 code to reproduce
```
module proba {
external function enc_fast(in integer pdu, out octetstring stream)
with { extension "prototype(fast)" extension "encode(RAW)" }
external function dec_backtrack(in octetstring stream, out integer pdu) return integer
with { extension "prototype(backtrack)" extension "decode(RAW)" }
} with {
encode "RAW"
}
```
```
compiler -L -Y proba.ttcn
Notify: Parsing TTCN-3 module `proba.ttcn'...
Notify: Checking modules...
proba.ttcn: In TTCN-3 module `proba':
proba.ttcn:3.1-66: In external function definition `enc_fast':
proba.ttcn:3.44-65: error: The second parameter must be an `out' value parameter for attribute `prototype(fast)' instead of `inout' value parameter
proba.ttcn:6.1-86: In external function definition `dec_backtrack':
proba.ttcn:6.56-70: error: The second parameter must be an `out' value parameter for attribute `prototype(backtrack)' instead of `inout' value parameter
Notify: Errors found in the input module. Code will not be generated.
```
## Titan version
git head
TTCN-3 and ASN.1 Compiler for the TTCN-3 Test Executor
Version: 10.1.2
Build date: Nov 4 2024 08:47:11
Compiled with: GCC 13.2.0
Using OpenSSL 3.0.13 30 Jan 2024
Commit id: 7fa0cbf13
## Platform details (OS type and version)
(OS type/distribution and version, e.g. Ubuntu 18.04, Windows 10+Cygwin)
/cc @aknappqwt @mmagyari
issue