pythonplugin: Fix compiler warning about unused format string argument
pythonplugin: Fix compiler warning about unused format string argument

  CC       libgstpythonplugin_la-gstpythonplugin.lo
gstpythonplugin.c:192:65: warning: data argument not used by format string
      [-Wformat-extra-args]
    GST_DEBUG ("GST_PLUGIN_SYSTEM_PATH set to %s", plugin_path, plugin_path);
               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~               ^

pexip/gst-python,freedesktop-unofficial-mirror/gstreamer__gst-python,GStreamer/gst-python,pexip/gst-python,GStreamer/gst-python,freedesktop-unofficial-mirror/gstreamer__gst-python,freedesktop-unofficial-mirror/gstreamer__gst-python,pexip/gst-python,GStreamer/gst-python