wildcard import with specific style gets deleted

`isort` deleted the following line from one of my files altogether

```
from findorserver.coupon.models import*
```

`.isort.cfg` contents:

```
[settings]
line_length = 120
multi_line_output = 5
balanced_wrapping = true
include_trailing_comma = true
skip = migrations
```

properly formatted wildcard imports were unaffected

thanks for the great tool!