qcdm: fix order of calloc() arguments
GCC 14 is unhappy. Not sure why does this matter, maybe it just does not. Let's silence the warning at the very least:
libqcdm/src/result.c: In function ‘val_new_string’:
libqcdm/src/result.c:76:25: warning: ‘calloc’ sizes specified with
‘sizeof’ in the earlier argument and not in the later argument
[-Wcalloc-transposed-args]
76 | v = calloc (sizeof (Val), 1);
| ^~~