Fix coverity warning on losing precision in integer division.
Fix coverity warning on losing precision in integer division.

Coverity CID #1261571

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