cmd: Added support for "&&" and "||" condition checking.

[Alexandre Julliard]

Alexander Coffin <alexcoffin1999 at gmail.com> writes:

> @@ -1478,7 +1557,9 @@ void WCMD_execute (const WCHAR *command, const WCHAR *redirects,
>      switch (i) {
>  
>        case WCMD_CALL:
> +        push_errorlevel_changed();
>          WCMD_call (p);
> +        pop_errorlevel_changed();

This seems to be the only place that does this, so I don't see why you
need to manage your own stack instead of saving/restoring things on the
process stack.

Also returning a success/failure value from the various functions that
implement commands would probably be cleaner than adding a global
'changed' flag.

-- 
Alexandre Julliard
julliard at winehq.org