bug in TREE-MODEL-ROW-DATA

I believe without the following patch TREE-MODEL-ROW-DATA will try to
get too many columns:

***************
*** 418,424 ****
    (coerce
     (loop
      with iter = (ensure-tree-iter model row)
!     for index from 0 to (tree-model-n-columns model)
      collect (tree-model-value model iter index))
     'vector))
  
--- 422,428 ----
    (coerce
     (loop
      with iter = (ensure-tree-iter model row)
!     for index from 0 below (tree-model-n-columns model)
      collect (tree-model-value model iter index))
     'vector))
  

-- 
walter pelissero
http://www.pelissero.de

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