[vtkusers] Appending cell data

[jarv0075]

The situation is thus:

I have two poly lines that I want to make into ONE poly-line, and
over-write one of the ORIGINAL poly lines with this new one.

So basically I want to append all of cell_2's points onto cell_1, and put
them back in cell_1's location in the same array.

How do I do this?!

This is another thing that seems like it should be very very very very very
easy to do but within the OO framework I can't see it.


Thanks