CID 1383617: Add null check
CID 1383617: Add null check

SolidWallOfCode/trafficserver,SolidWallOfCode/trafficserver,chitianhao/trafficserver,duke8253/trafficserver,pbchou/trafficserver,vmamidi/trafficserver,chitianhao/trafficserver,vmamidi/trafficserver,vmamidi/trafficserver,dyrock/trafficserver,dyrock/trafficserver,bryancall/trafficserver,chitianhao/trafficserver,davidbz/trafficserver,davidbz/trafficserver,duke8253/trafficserver,pbchou/trafficserver,bryancall/trafficserver,pbchou/trafficserver,pbchou/trafficserver,davidbz/trafficserver,chitianhao/trafficserver,duke8253/trafficserver,dyrock/trafficserver,bryancall/trafficserver,dyrock/trafficserver,dyrock/trafficserver,davidbz/trafficserver,vmamidi/trafficserver,chitianhao/trafficserver,dyrock/trafficserver,SolidWallOfCode/trafficserver,bryancall/trafficserver,duke8253/trafficserver,duke8253/trafficserver,pbchou/trafficserver,bryancall/trafficserver,davidbz/trafficserver,davidbz/trafficserver,dyrock/trafficserver,duke8253/trafficserver,chitianhao/trafficserver,vmamidi/trafficserver,bryancall/trafficserver,SolidWallOfCode/trafficserver,SolidWallOfCode/trafficserver,pbchou/trafficserver,vmamidi/trafficserver,SolidWallOfCode/trafficserver,SolidWallOfCode/trafficserver,chitianhao/trafficserver,duke8253/trafficserver