set the tracker_event to NULL if we cancelled the event.
set the tracker_event to NULL if we cancelled the event.

clearswift/trafficserver,SolidWallOfCode/trafficserver,vmamidi/trafficserver,rahmalik/trafficserver,persiaAziz/trafficserver,vmamidi/trafficserver,taoyunxing/trafficserver,dyrock/trafficserver,bryancall/trafficserver,rpufky/trafficserver,chitianhao/trafficserver,bryancall/trafficserver,taoyunxing/trafficserver,dyrock/trafficserver,bryancall/trafficserver,clearswift/trafficserver,chitianhao/trafficserver,chenglongwei/trafficserver,chitianhao/trafficserver,rahmalik/trafficserver,taoyunxing/trafficserver,persiaAziz/trafficserver,SolidWallOfCode/trafficserver,pbchou/trafficserver,chitianhao/trafficserver,pbchou/trafficserver,chenglongwei/trafficserver,chitianhao/trafficserver,clearswift/trafficserver,persiaAziz/trafficserver,clearswift/trafficserver,PSUdaemon/trafficserver,rahmalik/trafficserver,SolidWallOfCode/trafficserver,persiaAziz/trafficserver,bryancall/trafficserver,taoyunxing/trafficserver,dyrock/trafficserver,PSUdaemon/trafficserver,clearswift/trafficserver,bryancall/trafficserver,clearswift/trafficserver,duke8253/trafficserver,clearswift/trafficserver,persiaAziz/trafficserver,rpufky/trafficserver,chenglongwei/trafficserver,vmamidi/trafficserver,davidbz/trafficserver,rahmalik/trafficserver,PSUdaemon/trafficserver,pbchou/trafficserver,chenglongwei/trafficserver,persiaAziz/trafficserver,PSUdaemon/trafficserver,PSUdaemon/trafficserver,dyrock/trafficserver,bryancall/trafficserver,dyrock/trafficserver,reveller/trafficserver,rahmalik/trafficserver,rpufky/trafficserver,pbchou/trafficserver,vmamidi/trafficserver,pbchou/trafficserver,chenglongwei/trafficserver,duke8253/trafficserver,taoyunxing/trafficserver,duke8253/trafficserver,SolidWallOfCode/trafficserver,chenglongwei/trafficserver,SolidWallOfCode/trafficserver,reveller/trafficserver,rpufky/trafficserver,SolidWallOfCode/trafficserver,reveller/trafficserver,reveller/trafficserver,chitianhao/trafficserver,rpufky/trafficserver,persiaAziz/trafficserver,dyrock/trafficserver,chenglongwei/trafficserver,davidbz/trafficserver,rpufky/trafficserver,reveller/trafficserver,reveller/trafficserver,SolidWallOfCode/trafficserver,reveller/trafficserver,duke8253/trafficserver,PSUdaemon/trafficserver,taoyunxing/trafficserver,taoyunxing/trafficserver,vmamidi/trafficserver,rpufky/trafficserver,duke8253/trafficserver,chenglongwei/trafficserver,persiaAziz/trafficserver,rahmalik/trafficserver,taoyunxing/trafficserver,rpufky/trafficserver,pbchou/trafficserver,rahmalik/trafficserver,reveller/trafficserver,davidbz/trafficserver,davidbz/trafficserver,PSUdaemon/trafficserver,taoyunxing/trafficserver,PSUdaemon/trafficserver,chitianhao/trafficserver,dyrock/trafficserver,vmamidi/trafficserver,reveller/trafficserver,rpufky/trafficserver,rahmalik/trafficserver,davidbz/trafficserver,rahmalik/trafficserver,duke8253/trafficserver,davidbz/trafficserver,clearswift/trafficserver,clearswift/trafficserver,duke8253/trafficserver,PSUdaemon/trafficserver