- handle case when there are no nodes
authorMark Huang <mlhuang@cs.princeton.edu>
Wed, 24 May 2006 03:08:55 +0000 (03:08 +0000)
committerMark Huang <mlhuang@cs.princeton.edu>
Wed, 24 May 2006 03:08:55 +0000 (03:08 +0000)

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