With gcc 14.2.1, build fails with `-Wimplicit-function-declaration` and `-Wincompatible-pointer-types`

[dreirund]

With gcc 14.2.1, build fails with -Wimplicit-function-declaration and -Wincompatible-pointer-types:

In file included from osdep.c:31:
env_unix.c: In function ‘lock_work’:
osdep.h:60:15: error: implicit declaration of function ‘safe_flock’ [-Wimplicit-function-declaration]
   60 | #define flock safe_flock
      |               ^~~~~~~~~~

news.c: In function ‘news_open’:
news.c:370:36: error: passing argument 3 of ‘scandir’ from incompatible pointer type [-Wincompatible-pointer-types]
  370 |   if ((nmsgs = scandir (tmp,&names,news_select,news_numsort)) >= 0) {
      |                                    ^~~~~~~~~~~
      |                                    |
      |                                    int (*)(struct dirent *)
In file included from osdep.h:47,
                 from news.c:35:
/usr/include/dirent.h:259:27: note: expected ‘int (*)(const struct dirent *)’ but argument is of type ‘int (*)(struct dirent *)’
  259 |                     int (*__selector) (const struct dirent *),
      |                     ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
news.c:370:48: error: passing argument 4 of ‘scandir’ from incompatible pointer type [-Wincompatible-pointer-types]
  370 |   if ((nmsgs = scandir (tmp,&names,news_select,news_numsort)) >= 0) {
      |                                                ^~~~~~~~~~~~
      |                                                |
      |                                                int (*)(const void *, const void *)
/usr/include/dirent.h:260:27: note: expected ‘int (*)(const struct dirent **, const struct dirent **)’ but argument is of type ‘int (*)(const void *, const void *)’
  260 |                     int (*__cmp) (const struct dirent **,
      |                     ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  261 |                                   const struct dirent **))
      |                                   ~~~~~~~~~~~~~~~~~~~~~~~

Regards!