nethack{,-x11}: fix build with GCC 15

diff --git a/include/system.h b/include/system.h

index a2cb51f..9f40fdd 100644

--- a/include/system.h

+++ b/include/system.h

@@ -60,17 +60,17 @@ typedef long off_t;

 #endif

 #ifndef SIG_RET_TYPE

 #if defined(NHSTDC) || defined(POSIX_TYPES) || defined(OS2) || defined(__DECC)

-#define SIG_RET_TYPE void (*)()

+#define SIG_RET_TYPE void (*)(int)

 #endif

 #endif

 #ifndef SIG_RET_TYPE

 #if defined(ULTRIX) || defined(SUNOS4) || defined(SVR3) || defined(SVR4)

 /* SVR3 is defined automatically by some systems */

-#define SIG_RET_TYPE void (*)()

+#define SIG_RET_TYPE void (*)(int)

 #endif

 #endif

 #ifndef SIG_RET_TYPE /* BSD, SIII, SVR2 and earlier, Sun3.5 and earlier */

-#define SIG_RET_TYPE int (*)()

+#define SIG_RET_TYPE int (*)(int)

 #endif

 #if !defined(__cplusplus) && !defined(__GO32__)

@@ -96,7 +96,7 @@ E long NDECL(lrand48);

 E void FDECL(srand48, (long));

 #else

 E long lrand48();

-E void srand48();

+E void srand48(long);

 #endif /* MACOSX */

 #endif /* BSD || ULTRIX || RANDOM */

@@ -352,10 +352,10 @@ E char *FDECL(memset, (char *, int, int));

 #endif /* MICRO */

 #if defined(BSD) && defined(ultrix) /* i.e., old versions of Ultrix */

-E void sleep();

+E void sleep(unsigned);

 #endif

 #if defined(ULTRIX) || defined(SYSV)

-E unsigned sleep();

+E unsigned sleep(unsigned);

 #endif

 #if defined(HPUX)

 E unsigned int FDECL(sleep, (unsigned int));

@@ -519,7 +519,7 @@ E char *FDECL(tgoto, (const char *, int, int));

 #else

 #if !(defined(HPUX) && defined(_POSIX_SOURCE))

 E int FDECL(tgetent, (char *, const char *));

-E void FDECL(tputs, (const char *, int, int (*)()));

+E void FDECL(tputs, (const char *, int, int (*)(int)));

 #endif

 E int FDECL(tgetnum, (const char *));

 E int FDECL(tgetflag, (const char *));

diff --git a/include/winX.h b/include/winX.h

index a1a5605..1d6b84b 100644

--- a/include/winX.h

+++ b/include/winX.h

@@ -279,7 +279,7 @@ typedef struct {

 } AppResources;

 E AppResources appResources;

-E void (*input_func)();

+E void (*input_func)(Widget, XEvent *, String *, Cardinal *);

 extern struct window_procs X11_procs;

diff --git a/include/xwindow.h b/include/xwindow.h

index 8b9cfa0..8307c25 100644

--- a/include/xwindow.h

+++ b/include/xwindow.h

@@ -76,8 +76,10 @@

 #define XtNexposeCallback "exposeCallback"

 #define XtNresizeCallback "resizeCallback"

-extern XFontStruct *WindowFontStruct(/* Widget */);

-extern Font WindowFont(/* Widget */);

+struct Widget;

+

+extern XFontStruct *WindowFontStruct(Widget);

+extern Font WindowFont(Widget);

 #define XtCWindowResource "WindowResource"

 #define XtCRows "Rows"

    hash = "sha256-mM9n323r+WaKYXRaqEwJvKs2Ll0z9blE7FFV1E0qrLI=";

  };

  patches = [

    # Newer GCC rejects function declarations without explicit parameters.

    ./function-parameters.patch

  ];

  buildInputs = [

    ncurses

  ]