Windows style path in .zip files

[eXl5eQ]

This commit adds code to convert Windows style path "" to "/" when writing an entry.

#if defined(_WIN32) && !defined(__CYGWIN__)
	/* Make sure the path separators in pahtname, hardlink and symlink
	 * are all slash '/', not the Windows path separator '\'. */
	l->entry = __la_win_entry_in_posix_pathseparator(entry);
	if (l->entry == entry)
		l->entry = archive_entry_clone(entry);
#else

Which looks fine. However, if a charset conversion is required, l->entry will later be overwrited by these code

if (sconv != NULL) {
	...
	if (archive_entry_pathname_l(entry, &p, &len, sconv) != 0) { ... }
	if (len > 0)
		archive_entry_set_pathname(l->entry, p);

Suggested fix:

Change the entry in archive_entry_pathname_l(entry, &p, &len, sconv) to l->entry (or zip->entry in latest version)