Output trace for prune & graft

[ChengLin TAN <chenglin@acm.org>]

hi,

i am using ns-2.1b2.  Is there some mixup in the graft and prune naming
in the output trace?  The names seem to have swap. ie. the entries in
the 'out.tr' show 'graft' instead of 'prune', when the packet should be
a 'prune'.

thanks.
regards,
Cheng Lin TAN