Generated as:
$ curl -L https://github.com/yangboz/sgfutils/pull/3.diff > gcc-15.patch

Fix `gcc-15` build failure related to `c23` changes.
--- a/gib2sgf.c
+++ b/gib2sgf.c
@@ -433,7 +433,7 @@ static void stoline(char *buf) {
 	readmove(buf);
 }
 
-static void (*inputline[])() = {
+static void (*inputline[])(char*) = {
 	inline0, inline1, iniline, stoline
 };
 
--- a/sgfinfo.c
+++ b/sgfinfo.c
@@ -940,7 +940,7 @@ void report_on_single_game() {
 	if (optM) {
 		int imin, imax;
 		void (*fns[3])(int) = { outmove, outmovec, outmovex };
-		void (*outmovefn)();
+		void (*outmovefn)(int);
 
 		/* 1..3 moves / 4..6 init / 7..9 both */
 		imin = ((optM < 4) ? initct : 0);