mail/panda-cclient: fix build with clang 16
Clang 16 has a new error about incompatible function types, which shows
up when building mail/panda-cclient:
news.c:370:36: error: incompatible function pointer types passing 'int (struct dirent *)' to parameter of type 'int (*)(const struct dirent *)' [-Wincompatible-function-pointer-types]
if ((nmsgs = scandir (tmp,&names,news_select,news_numsort)) >= 0) {
^~~~~~~~~~~
/usr/include/dirent.h:127:12: note: passing argument to parameter here
int (*)(const struct dirent *), int (*)(const struct dirent **,
^
news.c:370:48: error: incompatible function pointer types passing 'int (const void *, const void *)' to parameter of type 'int (*)(const struct dirent **, const struct dirent **)' [-Wincompatible-function-pointer-types]
if ((nmsgs = scandir (tmp,&names,news_select,news_numsort)) >= 0) {
^~~~~~~~~~~~
/usr/include/dirent.h:127:44: note: passing argument to parameter here
int (*)(const struct dirent *), int (*)(const struct dirent **,
^This is because the prototypes for the scandir(3) 'select' and 'compar'
callback function parameters do not match the declarations in
<dirent.h>. The same occurs in a few other files under src/osdep/unix.
Fix these by using the correct parameter types for the callback functions.
PR: 271539
Approved by: thierry (maintainer)
MFH: 2023Q2