Check for user_id=#-1 before calling change_uid_gid()
Check for user_id=#-1 before calling change_uid_gid()

git-svn-id: 2dd0c813ec5e66d7196e5ee63433c56c88d5b4b7@944608 13f79535-47bb-0310-9956-ffa450edef68

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