gitk: replace parent and children arrays with lists
authorPaul Mackerras <paulus@samba.org>
Sun, 2 Apr 2006 10:47:40 +0000 (20:47 +1000)
committerPaul Mackerras <paulus@samba.org>
Sun, 2 Apr 2006 10:47:40 +0000 (20:47 +1000)
This will make it easier to switch between views efficiently, and
turns out to be slightly faster as well.

Signed-off-by: Paul Mackerras <paulus@samba.org>

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