fix SF#1906640 (different fix than on branch)
fix SF#1906640 (different fix than on branch)

RunningLight/machinekit,ArcEye/machinekit-testing,EqAfrica/machinekit,aschiffler/linuxcnc,unseenlaser/linuxcnc,mhaberler/machinekit,cdsteinkuehler/MachineKit,kinsamanka/machinekit,araisrobo/machinekit,ArcEye/machinekit-testing,EqAfrica/machinekit,jaguarcat79/ILC-with-LinuxCNC,mhaberler/machinekit,unseenlaser/linuxcnc,EqAfrica/machinekit,strahlex/machinekit,kinsamanka/machinekit,EqAfrica/machinekit,unseenlaser/linuxcnc,RunningLight/machinekit,ArcEye/MK-Qt5,unseenlaser/linuxcnc,araisrobo/linuxcnc,araisrobo/machinekit,cdsteinkuehler/linuxcnc,ArcEye/machinekit-testing,strahlex/machinekit,cdsteinkuehler/linuxcnc,ArcEye/MK-Qt5,cnc-club/linuxcnc,unseenlaser/linuxcnc,araisrobo/machinekit,EqAfrica/machinekit,cnc-club/linuxcnc,jaguarcat79/ILC-with-LinuxCNC,yishinli/emc2,araisrobo/machinekit,kinsamanka/machinekit,mhaberler/machinekit,RunningLight/machinekit,Cid427/machinekit,narogon/linuxcnc,kinsamanka/machinekit,cnc-club/linuxcnc,araisrobo/machinekit,cdsteinkuehler/linuxcnc,araisrobo/linuxcnc,unseenlaser/machinekit,bmwiedemann/linuxcnc-mirror,araisrobo/linuxcnc,araisrobo/linuxcnc,cdsteinkuehler/MachineKit,bmwiedemann/linuxcnc-mirror,EqAfrica/machinekit,unseenlaser/machinekit,mhaberler/machinekit,bobvanderlinden/machinekit,RunningLight/machinekit,strahlex/machinekit,ikcalB/linuxcnc-mirror,ArcEye/MK-Qt5,ianmcmahon/linuxcnc-mirror,ikcalB/linuxcnc-mirror,ArcEye/MK-Qt5,Cid427/machinekit,narogon/linuxcnc,Cid427/machinekit,ikcalB/linuxcnc-mirror,ikcalB/linuxcnc-mirror,jaguarcat79/ILC-with-LinuxCNC,yishinli/emc2,kinsamanka/machinekit,Cid427/machinekit,ianmcmahon/linuxcnc-mirror,ikcalB/linuxcnc-mirror,cdsteinkuehler/MachineKit,kinsamanka/machinekit,narogon/linuxcnc,ArcEye/MK-Qt5,strahlex/machinekit,Cid427/machinekit,bmwiedemann/linuxcnc-mirror,unseenlaser/machinekit,yishinli/emc2,jaguarcat79/ILC-with-LinuxCNC,cnc-club/linuxcnc,Cid427/machinekit,jaguarcat79/ILC-with-LinuxCNC,unseenlaser/machinekit,ArcEye/machinekit-testing,mhaberler/machinekit,strahlex/machinekit,ArcEye/MK-Qt5,aschiffler/linuxcnc,strahlex/machinekit,EqAfrica/machinekit,bobvanderlinden/machinekit,unseenlaser/machinekit,ArcEye/machinekit-testing,narogon/linuxcnc,ArcEye/MK-Qt5,kinsamanka/machinekit,Cid427/machinekit,RunningLight/machinekit,bmwiedemann/linuxcnc-mirror,cdsteinkuehler/MachineKit,RunningLight/machinekit,ikcalB/linuxcnc-mirror,mhaberler/machinekit,EqAfrica/machinekit,Cid427/machinekit,cdsteinkuehler/MachineKit,RunningLight/machinekit,strahlex/machinekit,ikcalB/linuxcnc-mirror,cnc-club/linuxcnc,mhaberler/machinekit,ArcEye/machinekit-testing,cdsteinkuehler/linuxcnc,bmwiedemann/linuxcnc-mirror,araisrobo/machinekit,bmwiedemann/linuxcnc-mirror,ArcEye/machinekit-testing,cdsteinkuehler/linuxcnc,mhaberler/machinekit,aschiffler/linuxcnc,bobvanderlinden/machinekit,cnc-club/linuxcnc,unseenlaser/machinekit,ianmcmahon/linuxcnc-mirror,ianmcmahon/linuxcnc-mirror,unseenlaser/machinekit,bobvanderlinden/machinekit,araisrobo/machinekit,aschiffler/linuxcnc,ArcEye/machinekit-testing,yishinli/emc2,RunningLight/machinekit,cnc-club/linuxcnc,ianmcmahon/linuxcnc-mirror,araisrobo/machinekit,cdsteinkuehler/MachineKit,bobvanderlinden/machinekit,araisrobo/linuxcnc,kinsamanka/machinekit,ianmcmahon/linuxcnc-mirror,bobvanderlinden/machinekit,narogon/linuxcnc,bobvanderlinden/machinekit,cdsteinkuehler/linuxcnc,aschiffler/linuxcnc,ianmcmahon/linuxcnc-mirror,bmwiedemann/linuxcnc-mirror,ArcEye/MK-Qt5,unseenlaser/machinekit,araisrobo/machinekit,bobvanderlinden/machinekit