--invert does not work correctly with --subtotal #1803
Description
The following reg --monthly --invert report:
19-Jun-01 - 19-Jun-30 Foo $-2,591.19 $5,991.49
Bar $-1,877.66 $4,113.83
Baz $17,361.62 $21,475.45
Shows as follows with -n:
19-Jun-01 - 19-Jun-30 <Total> $-12,892.77 $21,475.45
Subtotaling is not using the inverted values for the amount field, although the total (which feeds from the underlying postings, not the subtotal) still works.