shntool: fix build with GCC 15

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

index 567993e..ab293f8 100644

--- a/include/format.h

+++ b/include/format.h

@@ -35,7 +35,7 @@ void tagcpy(unsigned char *,unsigned char *);

 int tagcmp(unsigned char *,unsigned char *);

 /* function to check if a file name is about to be clobbered, and if so, asks whether this is OK */

-int clobber_check(char *);

+bool clobber_check(char *);

 /* find an output format module with the given name */

 format_module *find_format(char *);

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

index a9c8cd0..fc13d4f 100644

--- a/include/mode.h

+++ b/include/mode.h

@@ -78,7 +78,7 @@ void create_output_filename(char *,char *,char *);

 FILE *open_output_stream(char *,proc_info *);

 /* function to determine if two filenames point to the same file */

-int files_are_identical(char *,char *);

+bool files_are_identical(char *,char *);

 /* function to remove a file if it exists */

 void remove_file(char *);

diff --git a/include/module-types.h b/include/module-types.h

index c49c661..2d7b0a3 100644

--- a/include/module-types.h

+++ b/include/module-types.h

@@ -23,6 +23,8 @@

 #ifndef __MODULE_TYPES_H__

 #define __MODULE_TYPES_H__

+#include <stdbool.h>

+

 #ifdef HAVE_CONFIG_H

 #include "config.h"

 #endif

@@ -44,8 +46,6 @@

 #define PATHSEPCHAR '/'

 #endif

-/* boolean type */

-typedef int bool;

 /* wtypes */

 typedef unsigned long wlong;

diff --git a/src/core_mode.c b/src/core_mode.c

index d67e317..21d3b9e 100644

--- a/src/core_mode.c

+++ b/src/core_mode.c

@@ -564,17 +564,17 @@ static int compare_ascii(const wave_info **w1,const wave_info **w2)

 static void ascii_sort_files(wave_info **filenames, int numfiles)

 {

-  int (*cmpfunc) ();

+  int (*cmpfunc) (const void *, const void *);

-  cmpfunc = compare_ascii;

+  cmpfunc = (int (*)(const void *, const void *))compare_ascii;

   qsort(filenames,numfiles,sizeof(wave_info *),cmpfunc);

 }

 static void version_sort_files(wave_info **filenames,int numfiles)

 {

-  int (*cmpfunc) ();

+  int (*cmpfunc) (const void *, const void *);

-  cmpfunc = compare_version;

+  cmpfunc = (int (*)(const void *, const void *))compare_version;

   qsort(filenames,numfiles,sizeof(wave_info *),cmpfunc);

 }

    sha256 = "sha256-Qn4LwVx34EhypiZDIxuveNhePigkuiICn1nBukoQf5Y=";

  };

  patches = [

    # Fix conflicts between reserved keywords `bool` (starting from C23) and custom `typedef`s.

    ./bool-type.patch

    # Fix implicit weak-typed pointer casting.

    ./function-pointer-type.patch

  ];

  buildInputs = [ flac ];

  prePatch = ''

    patches=$(grep -v '#' ./debian/patches/series | while read patch; do echo "./debian/patches/$patch"; done | tr '\n' ' ')

    additional_patches=$(grep -v '#' ./debian/patches/series | while read patch; do echo "./debian/patches/$patch"; done | tr '\n' ' ')

    patches="$patches $additional_patches"

  '';

  meta = {