Use C23 void-argument-free prototypes

In the future we can also consider moving to {} instead of {0} for
initialisers, but my old Clang (16) doesn't support this, so it might be
wise to wait longer on that one so people don't need too bleeding-edge
of a compiler just to build this thing.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/os.h b/src/os.h
index ca376b7..cb78e06 100644
--- a/src/os.h
+++ b/src/os.h
@@ -131,7 +131,7 @@ static inline void os_spancopy(os_char *restrict dest,
  * For standard libc functions (implemented by UCRT on Windows), the value of
  * errno should be used directly instead.
  */
-int os_lasterror(void);
+int os_lasterror();
 
 /*
  * Opens a file for reading. Returns an OS-specific file handle, or -1 on error.