[Bug 731716] funnel: fix eos handling and unit test case

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=731716
  GStreamer | gstreamer (core) | 1.2.4

--- Comment #6 from Srimanta Panda <panda_srimanta at yahoo.co.in> 2014-06-19 13:25:07 UTC ---
Created an attachment (id=278766)
 View: https://bugzilla.gnome.org/attachment.cgi?id=278766
 Review: https://bugzilla.gnome.org/review?bug=731716&attachment=278766

Patch for fix funnel EOS handling and wrong unittest

When no data is coming from sinkpads and eos events
arrived at one of the sinkpad, funnel forwards the EOS
event to downstream. It forwards the EOS because lastsink pad
is NULL. Also the unit testcase of the funnel is not checking
the correct behavior as it should. The unit test case should
fail if one of the sink pad has already EOS present on it and
we are trying to push one more EOS.

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