bug#40314: `guild doc-snarf -l c mycfile.c` does not extract docs

[Alexandros Theodotou]

Hi,

Running the command `guild doc-snarf -l c mycfile.c` does not extract 
docs. I have tried with this file 
https://git.zrythm.org/cgit/zrythm/tree/src/guile/audio/position.c?id=fd9881f34096f616a876d257bc74233c1f14218d 
as well as with libguile/alist.c from the guile distribution and I get 
empty output, but when I run it on scheme files it produces docs.

Thanks,
Alex