[Bug 730510] facedetect: improve performance

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=730510
  GStreamer | gst-plugins-bad | 1.x

--- Comment #6 from Tim-Philipp Müller <t.i.m at zen.co.uk> 2014-07-24 13:33:08 UTC ---
> +    GST_LOG_OBJECT (filter,
> +        "Calculated stddev %f lesser than min_stddev %" G_GINT32_FORMAT
> 
> %lf as img_stddev is a double?

This is not required, since floats are automatically promoted to doubles in
vararg functions.

Just like "%" G_GINT32_FORMAT is not really needed, you can just use "%d" since
the gint32 would be promoted to a normal int in any case here.

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