[Bug 725917] multiqueue: do not reset last push result when pushing events

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=725917
  GStreamer | gstreamer (core) | unspecified

--- Comment #1 from Thiago Sousa Santos <thiago.sousa.santos at collabora.co.uk> 2014-03-07 20:53:00 UTC ---
Created an attachment (id=271266)
 View: https://bugzilla.gnome.org/attachment.cgi?id=271266
 Review: https://bugzilla.gnome.org/review?bug=725917&attachment=271266

multiqueue: do not reset last push result when pushing events

Use the last result as a default when pushing a item from a single queue,
otherwise the status gets reset to _OK when pushing events.

This causes problems when mistakenly activating a not-linked stream
that is being ignored upstream as it is not being used (adaptive
scenarios), it will make the multiqueue post a buffering message
on a pad that won't receive buffers

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