Fix broken logic in the poll-fd compaction function, which resulted in a panic during this sequence:
Fix broken logic in the poll-fd compaction function, which resulted in
a panic during this sequence:

	varnishd -d -d -T :8082
	ctrl-D
	telnet localhost 8082 (from other terminal)



git-svn-id: 7d4b18ab7d176792635d6a7a77dd8cbbea8e8daa@2722 d4fa192b-c00b-0410-8231-f00ffab90ce4

ssm/pkg-varnish,CartoDB/Varnish-Cache,wikimedia/operations-debs-varnish,CartoDB/Varnish-Cache,ssm/pkg-varnish,CartoDB/Varnish-Cache,ssm/pkg-varnish,wikimedia/operations-debs-varnish,wikimedia/operations-debs-varnish,wikimedia/operations-debs-varnish,ssm/pkg-varnish,wikimedia/operations-debs-varnish,ssm/pkg-varnish