lardawge/carrierwave_backgrounder — pull request #176 by gdott9 (2014-04-02 12:40:11+00:00)
Title: Check if record is nil before storing it

When the record doesn't exist anymore, the store_asset worker fails with the exception
```
undefined method `#{column}_tmp' for nil:NilClass
```
It needs to check if the record is nil before calling `#{column}_tmp` to fail silently as it does in process_asset.