candidate: fix compiler warnings on raspbian
candidate.c:351:12: warning: format ‘%lx’ expects argument of type ‘long unsigned int’, but argument 4/5 has type ‘guint64’ {aka ‘long long unsigned int’} [-Wformat=]
candidate.c:351:12: warning: format ‘%lx’ expects argument of type ‘long unsigned int’, but argument 4/5 has type ‘guint64’ {aka ‘long long unsigned int’} [-Wformat=]