Bug with -add and input from STDIN

Hello,

I finially could reproduce my last 'From' problem in the indexes:

        mhonarc -outdir one-mail -mbox        one-mail.mbox
        mhonarc -outdir one-mail -mbox -add < one-mail.mbox

Gives:
-------------------- snip ----------------------------------------
Mail Index

     Thread Index 


        o From: 
     * test msg-id header 
        o From: Achim Bohnet 
<ach(_at_)rosat(_dot_)mpe-garching(_dot_)mpg(_dot_)de> 


Mail converted by MHonArc 1.1.0+ 
--------------------- snap ---------------------------------------

-add's test for duplicate mail is wrong. The result is that
empty fields (date, from ...) are saved in .mhonarc.db
(and therefore empty fields are writen to the indexes).

This little patch fixed it for me (I'm not sure if the >= 0
test is still necessary):

--- ../../bin/mhonarc5  Thu Jan  4 23:52:01 1996
+++ mhonarc5    Mon Jan  8 13:17:34 1996
@@ -291,7 +291,7 @@
     ($index,$from,$date,$sub,$header) =
        &read_mail_header($handle, *mesg, *fields);
 
-    if ($index >= 0) {
+    if ($index != '' && $index >= 0) {
        ($From{$index},$Date{$index},$Subject{$index}) =
            ($from,$date,$sub);


Achim