Help with an ambiguous DBI error

This query can fail in a way that is masking the real error, since
'fid' isn't in a list of names that we're not specifying.

git-svn-id: http://code.sixapart.com/svn/mogilefs/trunk@1357 f67b2e87-0811-0410-a7e0-dd94e48410d6

lib/MogileFS/Store.pm

@@ -1441,7 +1441,7 @@ sub grab_files_to_delete2 {
             $dbh->begin_work;
             my $ut = $self->unix_timestamp;
             $to_del_map = $dbh->selectall_hashref(qq{
-                SELECT *
+                SELECT fid, nexttry, failcount
                 FROM file_to_delete2
                 WHERE nexttry <= $ut
                 ORDER BY nexttry