Linux: fix libevent bug.
Linux: fix libevent bug.

r17436 exposed a libevent bug where an array is not resized to a large
enough size when it's one element too short.

This bug will be upstreamed to libevent.

http://codereview.chromium.org/112089
BUG=11999


git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@17449 0039d316-1c4b-4281-b951-d872f2087c98

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