if (user_data == NULL) { return; }
params_hash_to_argv(gpointer key, gpointer value, gpointer user_data){	int param_index;        RA_ARGV * ra_argv  = user_data;        if (*ra_argv == NULL ) {                return;        }	/* the parameter index start from 1 */	/* and start from 2 in argv array */	param_index = atoi((char *)key);	(*ra_argv)[param_index + 1] = g_new(gchar, 21);	*((*ra_argv)[param_index + 1] + 20) = '\0';        strncpy((*ra_argv)[param_index +1], (char*)value,                strnlen((char*)value, 20));}