Upcoming `gcc-14` enabled a few warnings into errors, like
`-Wimplicit-function-declaration`. This caused `shadow` build to fail
as:
pwunconv.c: In function 'main':
pwunconv.c:132:13: error: implicit declaration of function 'getdef_bool' [-Wimplicit-function-declaration]
132 | if (getdef_bool("USE_TCB")) {
| ^~~~~~~~~~~
The change adds missing include headers.
#include <unistd.h>
#include <getopt.h>
#include "defines.h"
+#include "getdef.h"
#include "nscd.h"
#include "sssd.h"
#include "prototypes.h"
#include "alloc.h"
#include "defines.h"
+#include "getdef.h"
#include "groupio.h"
#include "nscd.h"
#include "sssd.h"