emcmodule.cc: fail gracefully for linuxcnc.ini()
emcmodule.cc: fail gracefully for linuxcnc.ini()

avoid segfault in Ini_dealloc()

before patch:
      $ python -c 'import linuxcnc; x=linuxcnc.ini()'
      Segmentation fault (core dumped)

after:
      $ python -c 'import linuxcnc; x=linuxcnc.ini()'
      Traceback (most recent call last):
        File "<string>", line 1, in <module>
      TypeError: function takes exactly 1 argument (0 given)

similar behavior for  x=linuxcnc.ini(None)

ikcalB/linuxcnc-mirror,ikcalB/linuxcnc-mirror,ikcalB/linuxcnc-mirror,araisrobo/machinekit,kinsamanka/machinekit,EqAfrica/machinekit,bobvanderlinden/machinekit,bmwiedemann/linuxcnc-mirror,mhaberler/machinekit,ikcalB/linuxcnc-mirror,unseenlaser/linuxcnc,ArcEye/MK-Qt5,ikcalB/linuxcnc-mirror,jaguarcat79/ILC-with-LinuxCNC,bmwiedemann/linuxcnc-mirror,ArcEye/MK-Qt5,Cid427/machinekit,strahlex/machinekit,bobvanderlinden/machinekit,RunningLight/machinekit,ArcEye/machinekit-testing,ArcEye/machinekit-testing,ianmcmahon/linuxcnc-mirror,kinsamanka/machinekit,cdsteinkuehler/linuxcnc,bobvanderlinden/machinekit,kinsamanka/machinekit,araisrobo/machinekit,unseenlaser/machinekit,araisrobo/machinekit,araisrobo/machinekit,ArcEye/machinekit-testing,araisrobo/machinekit,kinsamanka/machinekit,cdsteinkuehler/MachineKit,Cid427/machinekit,ArcEye/machinekit-testing,mhaberler/machinekit,ikcalB/linuxcnc-mirror,mhaberler/machinekit,RunningLight/machinekit,jaguarcat79/ILC-with-LinuxCNC,narogon/linuxcnc,bmwiedemann/linuxcnc-mirror,bobvanderlinden/machinekit,cdsteinkuehler/linuxcnc,cdsteinkuehler/MachineKit,ArcEye/MK-Qt5,unseenlaser/machinekit,RunningLight/machinekit,RunningLight/machinekit,EqAfrica/machinekit,strahlex/machinekit,bobvanderlinden/machinekit,araisrobo/machinekit,bmwiedemann/linuxcnc-mirror,bobvanderlinden/machinekit,EqAfrica/machinekit,aschiffler/linuxcnc,aschiffler/linuxcnc,Cid427/machinekit,unseenlaser/machinekit,EqAfrica/machinekit,ArcEye/machinekit-testing,aschiffler/linuxcnc,ArcEye/machinekit-testing,unseenlaser/linuxcnc,EqAfrica/machinekit,RunningLight/machinekit,cdsteinkuehler/linuxcnc,jaguarcat79/ILC-with-LinuxCNC,bobvanderlinden/machinekit,kinsamanka/machinekit,unseenlaser/linuxcnc,mhaberler/machinekit,narogon/linuxcnc,bmwiedemann/linuxcnc-mirror,unseenlaser/machinekit,unseenlaser/machinekit,RunningLight/machinekit,mhaberler/machinekit,ArcEye/MK-Qt5,EqAfrica/machinekit,bmwiedemann/linuxcnc-mirror,ArcEye/MK-Qt5,ArcEye/MK-Qt5,strahlex/machinekit,narogon/linuxcnc,unseenlaser/machinekit,cdsteinkuehler/MachineKit,cdsteinkuehler/MachineKit,unseenlaser/linuxcnc,ArcEye/MK-Qt5,araisrobo/machinekit,ArcEye/machinekit-testing,ianmcmahon/linuxcnc-mirror,ianmcmahon/linuxcnc-mirror,narogon/linuxcnc,araisrobo/machinekit,ianmcmahon/linuxcnc-mirror,ikcalB/linuxcnc-mirror,jaguarcat79/ILC-with-LinuxCNC,mhaberler/machinekit,Cid427/machinekit,ianmcmahon/linuxcnc-mirror,strahlex/machinekit,mhaberler/machinekit,ArcEye/machinekit-testing,unseenlaser/machinekit,strahlex/machinekit,strahlex/machinekit,Cid427/machinekit,strahlex/machinekit,Cid427/machinekit,mhaberler/machinekit,aschiffler/linuxcnc,kinsamanka/machinekit,cdsteinkuehler/linuxcnc,RunningLight/machinekit,kinsamanka/machinekit,Cid427/machinekit,unseenlaser/linuxcnc,bmwiedemann/linuxcnc-mirror,bobvanderlinden/machinekit,cdsteinkuehler/MachineKit,cdsteinkuehler/linuxcnc,RunningLight/machinekit,Cid427/machinekit,narogon/linuxcnc,cdsteinkuehler/linuxcnc,unseenlaser/machinekit,kinsamanka/machinekit,ArcEye/MK-Qt5,EqAfrica/machinekit,EqAfrica/machinekit,ianmcmahon/linuxcnc-mirror,cdsteinkuehler/MachineKit,jaguarcat79/ILC-with-LinuxCNC,araisrobo/machinekit,ianmcmahon/linuxcnc-mirror,aschiffler/linuxcnc