[BUG] hline references on left side of table formula

[Rick Frankel <rick@rickster.com>]

Hi-

I don't know if this is a bug or feature :), but if an hline reference
(@I, etc) is used on the left side of a calculation, it applies to ALL
columns in the row even if the column is specfied.

Here are some examples to show the results. I would expect all three
versions to generate the same results as the first example.

#+BEGIN_ORG
   * Absolute reference (expected results)
     | a | b |
     |---+---|
     | x | 1 |
     | y | 2 |
     |---+---|
     |   | 3 |
   #+TBLFM: @4$2=vsum(@I..@II)

   * hline reference
     | a     | b |
     |-------+---|
     | x     | 1 |
     | y     | 2 |
     |-------+---|
     | x + y | 3 |
   #+TBLFM: @II$2=vsum(@I..@II)

   * hline reference with full cell specification in sum
     | a | b |
     |---+---|
     | x | 1 |
     | y | 2 |
     |---+---|
     | 3 | 3 |
   #+TBLFM: @II$2=vsum(@I$2..@II$2)
   #+END_ORG

FWIW, I believe the problem is that `org-table-recalculate' is
matching lhs cell references explicitly against pure numeric
references ("@[0-9]+$[0-9]+") and therefore expands the lhs via
`org-expand-lhs-ranges' instead of expanding it with
`org-table-get-descriptor-line'

rick