Bug 180966 - warnings in webserver error log (take 2)

r=joel, a=justdave


git-svn-id: svn://10.0.0.236/trunk@134299 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/webtools/bugzilla/Bugzilla/User.pm

@@ -267,7 +267,7 @@ sub match_field {
         next if !defined($vars->{'mform'}->{$field});
 
         # Skip it if this is a --do_not_change-- field
-        next if $dontchange eq $vars->{'form'}->{$field};
+        next if $dontchange && $dontchange eq $vars->{'form'}->{$field};
 
         # We need to move the query to $raw_field, where it will be split up,
         # modified by the search, and put back into $::FORM and $::MFORM