fib_trie: handle empty tree
authorStephen Hemminger <shemminger@vyatta.com>
Tue, 12 Feb 2008 05:12:49 +0000 (21:12 -0800)
committerDavid S. Miller <davem@davemloft.net>
Wed, 13 Feb 2008 01:53:30 +0000 (17:53 -0800)
This fixes possible problems when trie_firstleaf() returns NULL
to trie_leafindex().

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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