Issue with array2d iter, inconsistent behaviour with rows and columns

[kalekje]

Noticed a bug with array2d.iter(). The first loop should print the indexes for the last TWO columns of the matrix M, but it only prints the second column. When I do a similar pattern for the rows, it works as expected.

M = {{1,2,3}, 
     {4,5,6}, 
     {7,8,9}}
for i,j in array2d.iter(M, true, 1, 2, 3, 3) do
    print(i,j)
end
print('----')
for i,j in array2d.iter(M, true, 2, 1, 3, 3) do
    print(i,j)
end

Output:

1	2
2	2
3	2
----
2	1
2	2
2	3
3	1
3	2
3	3