cast buf to get rid of warning

libc/sysdeps/linux/powerpc/pread_write.c

@@ -167,7 +167,7 @@ weak_alias(__libc_pread64,pread64)
 #ifndef __NR_pwrite
 ssize_t __libc_pwrite(int fd, const void *buf, size_t count, off_t offset)
 {
-	return(__fake_pread_write(fd, buf, count, offset, 1));
+	return(__fake_pread_write(fd, (void*)buf, count, offset, 1));
 }
 weak_alias(__libc_pwrite,pwrite)