Fix MAGN-2317

@lukechurch

This submission takes use of the following commit:
https://github.com/DynamoDS/Dynamo/commit/a567190311f09f4a8c7acab087d27a94783471d6

The submission make some changes to the original code to fix several errors because some code has changed ever since.

This submission fixes magn-2317.
change 
```
if (sid != null)
{
    if (sid.IntID == eid.IntegerValue)
    {
        ...
    }
}
```
To
```
if (sid == null || sid.IntID != eid.IntegerValue)
    continue
```
at least we remove two ``}``