fix warning when building non-RT version
fix warning when building non-RT version

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