PLCgen TwinCAT self-certification: build error on `SEL_DINT`
**Test report**
| Tool | Version |
| ------ | ------ |
| ESCET | nightly-20241023-115319 |
| TwinCAT | v3.1 build 4020.56 |
| Test suite | v27 |
Setup of TwinCAT as described here: https://cstweb.wtb.tue.nl/4tc00/twincat/setup.html#twincat-install.
Project generated as described here: https://eclipse.dev/escet/cif/tools/plcgen/twincat.html#twincat-usage.
**Test case**: `arrays.cif`
_Encountered errors_
The usage of `SEL_DINT` causes build errors, like:
- `Identifier 'SEL_DINT' not defined` in `\Untitled1\POUs\MAIN.TcPOU` line 807
- `Cannot convert type 'Unknown type: 'SEL_DINT((-2 >= SINT#0), (-2 + 2), -2)'' to type 'AnyInt'` in `\Untitled1\POUs\MAIN.TcPOU` line 807
- `Program name, function or function block instance expected instead of 'SEL_DINT'` in `\Untitled1\POUs\MAIN.TcPOU` line 807
The issue seems to be resolved once you change `SEL_DINT` to `SEL`, see https://infosys.beckhoff.com/english.php?content=../content/1033/tc3_plc_intro/2528956043.html&id=
Addresses #1020 #679
issue