Fix XFASTINT of non-fixnum in process status

* src/process.c (decode_status): 3rd arg is now Lisp_Object *,
not int *, and is not decoded.  All uses changed.
(status_message): Do not assume ‘failed’ code is an integer.
* src/process.h: Document codes better.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/process.h b/src/process.h
index a5f690dc55f..4430377877a 100644
--- a/src/process.h
+++ b/src/process.h
@@ -83,7 +83,8 @@ struct Lisp_Process
     Lisp_Object mark;
 
     /* Symbol indicating status of process.
-       This may be a symbol: run, open, or closed.
+       This may be a symbol: run, open, closed, listen, connect, or failed.
+       Or it may be (failed ERR) where ERR is an integer, string or symbol.
        Or it may be a list, whose car is stop, exit or signal
        and whose cdr is a pair (EXIT_CODE . COREDUMP_FLAG)
        or (SIGNAL_NUMBER . COREDUMP_FLAG).  */