[Bug 723271] New: videotestsrc: fix a warning if downstream does not propose a buffer pool

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=723271
  GStreamer | gst-plugins-base | 1.x

           Summary: videotestsrc: fix a warning if downstream does not
                    propose a buffer pool
    Classification: Platform
           Product: GStreamer
           Version: 1.x
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: julien.isorce at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=267620)
 View: https://bugzilla.gnome.org/attachment.cgi?id=267620
 Review: https://bugzilla.gnome.org/review?bug=723271&attachment=267620

videotestsrc: ensure having caps when setting the buffer pool config

* step to reproduce:

GST_DEBUG=2 gst-launch-1.0 videotestsrc ! fakesink

* actual result:

0:00:00.087664559  7697      0x14f8630 WARN                 default
gstvideopool.c:171:video_buffer_pool_set_config:<videobufferpool0> no caps in
config

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