TS-32: temp fix the overrun problem in PollDescriptor::alloc()
TS-32: temp fix the overrun problem in PollDescriptor::alloc()

may need better solution on pollfd.

Signed-off-by: Zhao Yongming <eca9d57b880172e8207745bc51e4841c7b6c0a64@gmail.com>

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