Please describe the problem:
After a stock consolidation (negative split), the value of the stock is shown incorrectly in Trial Balance; the difference between correct and displayed value carries through to the total line, resulting in an apparent failure to balance.

Steps to reproduce:
1. Create a new file including the "Investment Accounts" group
2. Create a suitable stock account
3. enter a transaction to purchase, say, 500 at 4 each, total 2000
4. Use the Stock Split Wizard to enter a negative split: say, -200, with no cash amount involved. This changes the number of shares held but should not change the total value
5. Invoke a Trial balance report


Actual results:
Trial Balance report shows value of 857.14 (should be 2000) against the stock; 2000 against whichever account the purchase came from; and these respective amounts in Debit and Credit column totals, for an imbalance of 1142.86.

Expected results:
Correct amount of 2000 showing against the stock and in the debit column total.

Does this happen every time?
Yes, provided only that the split is negative.

Other information:
Playing with the figures shows that the report is apparently trying to calculate a weighted average of the prices in order to revalue the residual stock, but is always adding the number of shares involved in the split (i.e. taking the absolute value). A positive number (i.e. a distribution rather than a consolidation) gives the expected result.

Correct calculation:
     500 at 4 = 2000
less 200 at 0 =    0
   = 300    for 2000 = 6.6667 each
Trial Balance: 300 at 6.6667 = 2000

Calculation apparently used:
     500 at 4 = 2000
plus 200 at 0 =    0
   = 700    for 2000 = 2.85714 each
Trial Balance: 300 at 2.85 = 857.14