Flexget/Flexget — pull request #234 by tarzasai (2014-03-04 11:17:27+00:00)
Title: Protect imdb_id field from rottentomatoes_lookup

If the alternate_ids list in rottentomatoes_lookup's movie object does not contains a valid imdb_id, the plugin **might** assign it to None on target entry, eventually clearing a real value **or** preventing any other metainfo plugin to assign it (since the field it's not lazy anymore).

Example 1 (imdb_id is _None_):
```
rtl:
mock:
- { title: '12 Years a Slave' }
imdb_lookup: yes
rottentomatoes_lookup: yes
if:
- imdb_languages: accept
- rt_critics_score: reject
```

Example 2 (changing the conditions order the imdb_id is good):
```
rtl:
mock:
- { title: '12 Years a Slave' }
imdb_lookup: yes
rottentomatoes_lookup: yes
if:
- rt_critics_score: reject
- imdb_languages: accept
```