C gen issue using nim-lang/opengl
### Description
Effects my current project, but  compiling https://github.com/nim-lang/opengl/blob/master/examples/glut_example.nim does reproduce the C gen error:
```
35:8: error: expected identifier or ‘(’ before string constant
 1235 | extern "C" N_NIMCALL(void, nimLoadProcs0)(void) {
      |        ^~~
```

### Nim Version

Nim Compiler Version 2.2.1 [Linux: amd64]
Compiled at 2024-11-15
Copyright (c) 2006-2024 by Andreas Rumpf

git hash: 726195d784b452e001ccf31ee3f79655a92c1fa6
active boot switches: -d:release

### Current Output

_No response_

### Expected Output

_No response_

### Known Workarounds

_No response_

### Additional Information

_No response_