From: Mario Rugiero <mrugi...@gmail.com>

Double pointer allows to process lists in a more linear fashion.
The functions changed are:
icon_grid_add
icon_grid_set_constrain_width
icon_grid_remove
icon_grid_reorder_child

NOTE I'm not exactly sure how to test this.


I suppose the first test/requirement would be to show that the existing
linked list demonstrates a performance problem somewhere? What is the
problem that is trying to be solved here?

Secondly, the most notorious problem with two-way lists is possible
inconsistencies among the pointers, either through coding errors or
through interruptions to processing at some point. So I suppose the
most useful tests would be to introduce some inconsistencies and
demonstrate that the code recovers the situation sensibly.

BTW, congrats on the series of patches you have provided.


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