xsokoban: fix build agaist gcc-14

It's a really old program. Let's disable most implicit
declarations to restore the build.

pkgs/by-name/xs/xsokoban/package.nix

···
     libXt
   ];
 
-  env.NIX_CFLAGS_COMPILE = "-I${libXpm.dev}/include/X11";
+  env.NIX_CFLAGS_COMPILE = "-I${libXpm.dev}/include/X11 -Wno-error=implicit-int -Wno-error=implicit-function-declaration";
 
   hardeningDisable = [ "format" ];
 
···
 
   preConfigure = ''
     sed -e 's/getline/my_getline/' -i score.c
+    sed -e 's/getpass/my_getpass/' -i externs.h display.c
 
     chmod a+rw config.h
     cat >>config.h <<EOF
···
 
   meta = with lib; {
     description = "X sokoban";
+    homepage = "https://www.cs.cornell.edu/andru/xsokoban.html";
     mainProgram = "xsokoban";
     license = licenses.publicDomain;
     maintainers = [ maintainers.raskin ];