[Mimedefang] graphdefang issues

[Kenneth Porter]

Here's patch for the most common set of issues.
-------------- next part --------------
--- graphdefanglib.pl.000       2003-10-22 13:08:57.000000000 -0700
+++ graphdefanglib.pl   2004-09-10 21:22:31.802813159 -0700
@@ -266,6 +266,8 @@
                $pid = $4;
                $text = $5;

+               next if !defined $host or !defined $program;
+
                # Parse date string from syslog using any TIMEZONE info from the config file.
                if (defined $TZ{$host}) {
                        my $zone = tz2zone($TZ{$host});