[TS-3294]: Fix forward_null defect
[TS-3294]: Fix forward_null defect

Coverity CID#1269606

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