[Bug 776336] NULL GstStructures cannot be deserialized

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=776336

--- Comment #4 from Stefan Sauer (gstreamer, gtkdoc dev) <ensonic at sonicpulse.de> ---
>From the tracer we're actually getting this, because we're logging with
GST_PTR_FORMAT. When using gst_structure_to_string() having NULL ptr as
structure fields does not work actually :/

Here is some background for it:
https://cgit.freedesktop.org/gstreamer/gstreamer/tree/plugins/tracers/gststats.c#n460

The tracer builds a structure compatible sprintf format for performance
reasons. Maybe I need to sprintf each field and skip those that are NULL.

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