MemView: Fix methods return type definitions to be more consistent.
MemView: Fix methods return type definitions to be more consistent.

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