[Bug 739789] New: v4l2allocator: fix error message if allocator is already active

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=739789
  GStreamer | gst-plugins-good | git

           Summary: v4l2allocator: fix error message if allocator is
                    already active
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: trivial
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: aurelien.zanelli at parrot.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Message if allocator is already active is currently wrong in allocator_start(),
we have not request any buffer from drivers.

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