MT import causes empty feed

[hailin]

$line .= "\n"; L442 in wp-admin/import/mt.php causes an issue in feed: when there is no excerpt, it inserts \n in post_excerpt, and since it's no longer empty, the_excerpt_rss() will return \n, resulting in blank rss <description> entry.

I think saving \n to db is not very good (although it probably doesn't hurt).
A safe fix is just to do:

if( !empty($line) )

$line .= "\n";

Thanks to sivel for discussions on IRC.

[hailin]

patch

[azaozz]

(In [10429]) Fix empty feed after MT import, props hailin, fixes #8944

[azaozz]

(In [10430]) Fix empty feed after MT import, props hailin, fixes #8944 for trunk