Merge pull request #257 from jpoutiai/master

[RILMODEM] free before calling g_strdup to avoid mem leak
[RILMODEM] recheck status value before using it

Signed-off-by: Jarko Poutiainen <Jarko.Poutiainen@oss.tieto.com>
[RILMODEM] recheck status also in ril_data_probe_reg_cb

Signed-off-by: Jarko Poutiainen <Jarko.Poutiainen@oss.tieto.com>
Merge branch 'gprs' of https://github.com/jpoutiai/ofono into gprs-hacking