[newlib-cygwin/main] ftw: Fix incompatible pointer types error

[Jeff Johnston]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=577ce85eadcb1014fd02304768cffc5f1d9ba75b

commit 577ce85eadcb1014fd02304768cffc5f1d9ba75b
Author: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date:   Sat May 17 18:39:22 2025 +0200

    ftw: Fix incompatible pointer types error
    
    This fixes a compile error with GCC 15.

Diff:
---
 newlib/libc/posix/ftw.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/newlib/libc/posix/ftw.c b/newlib/libc/posix/ftw.c
index 79e63582c..e3ca85cc5 100644
--- a/newlib/libc/posix/ftw.c
+++ b/newlib/libc/posix/ftw.c
@@ -30,7 +30,9 @@ int ftw(const char *path, int (*fn)(const char *, const struct stat *, int), int
 	/* The following cast assumes that calling a function with one
 	 * argument more than it needs behaves as expected. This is
 	 * actually undefined, but works on all real-world machines. */
-	return nftw(path, (int (*)())fn, fd_limit, FTW_PHYS);
+	return nftw(path,
+	    (int (*)(const char *, const struct stat *, int,  struct FTW *))fn,
+	    fd_limit, FTW_PHYS);
 }
 
 #endif /* ! HAVE_OPENDIR */