Fix compilation of eventloop with probes

Change-Id: Ia885584363de9070200a53acd80d48e3cbeda6fe
Reviewed-on: http://gerrit.aldebaran.lan/48421
Approved: hcuche <hcuche@aldebaran-robotics.com>
Reviewed-by: hcuche <hcuche@aldebaran-robotics.com>
Tested-by: hcuche <hcuche@aldebaran-robotics.com>