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); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^