Please describe the problem:
If a split is opened before money amounts are entered, then an
'Orphan-(currency)' line appears.

Steps to reproduce:
1. Create a new 'Simple Checkbook' tree.
2. Open 'Income'.
3. Hit tab, tab, type 'Paycheck'.
4. Hit the 'Split' button.


Actual results:
A single 'Orphan-USD' line appears. When I actually click on it, it changes to
an 'Income' line and a blank line below it.

Expected results:
The two lines ('Income' and the blank) should appear when I click 'Split' (as
long as I've edited the transaction in some way), before I click down to the line,

Does this happen every time?
Yes, this is repeatable.

Other information:
It seems that the blank transaction at the bottom of the register always
contains a single, zero-valued split for Orphan-(currency). So I can see that
it's coming from somewhere; however, this split shouldn't be visible once the
transaction is being edited.