Populate variable needed for batch item receive

Populate variable needed for batch item receive

In the integrated alt editor, we load the sub. grid differently, so
'sub' was not being populated.  Since we should only ever have one
subscription showing at a time (in this view), we can simply assign
the item to 'sub' as it is received.

Signed-off-by: Dan Wells <dbw2@calvin.edu>
Signed-off-by: Lebbeous Fogle-Weekley <lebbeous@esilibrary.com>