Fixes the issues that popActivity method does not work sometimes.
Fixes the issues that popActivity method does not work sometimes.

TransitApp/SVProgressHUD,powerhome/SVProgressHUD,pblondin/SVProgressHUD,ddc391565320/SVProgressHUD,dongdonggaui/SVProgressHUD,CPF183/SVProgressHUD,DramaFever/DFProgressHUD,lzhao18/SVProgressHUD,SVProgressHUD/SVProgressHUD,wrcj12138aaa/SVProgressHUD,morgman/TASVProgressHUD,Karumi/SVProgressHUD,hnney/SVProgressHUD,pengleelove/SVProgressHUD,Pingco/SVProgressHUD,kohtenko/SVProgressHUD,emodeqidao/SVProgressHUD,ShowerLi1991/SVProgressHUD,RyanCodes/SVProgressHUD,dxt/SVProgressHUD,flovilmart/SVProgressHUD,cuppi/SVProgressHUD,Sunday4/SVProgressHUD,PeeJWeeJ/SwiftyHUD,zoyi/SVProgressHUD,phildow/SVProgressHUD,z514306470/SVProgressHUD,yarneo/SVProgressHUD,adrum/SVProgressHUD,Staance/SVProgressHUD,huqiji/SVProgressHUD,haiiev/SVProgressHUD,AutoScout24/SVProgressHUD,basvankuijck/SVProgressHUD,sdonly/SVProgressHUD,ezescaruli/SVProgressHUD,bertramdev/SVProgressHUD,Alsen007/SVProgressHUD,CoderJFCK/SVProgressHUD,apascual/SVProgressHUD,ohyeslk/SVProgressHUD,bhapca/SVProgressHUD,PeeJWeeJ/SwiftyHUD,icepy/SVProgressHUD,shenhzou654321/SVProgressHUD,SuPair/SVProgressHUD,zeptolee/SVProgressHUD,cnbin/SVProgressHUD,taviscaron/SVProgressHUD,maxcampolo/SVProgressHUD,siburb/SVProgressHUD,hanangellove/SVProgressHUD,grachyov/SVProgressHUD,Kevin775263419/SVProgressHUD,cnzlh/SVProgressHUD,isghe/SVProgressHUD,iamcharleych/SVProgressHUD,shizu2014/SVProgressHUD,wjszf/SVProgressHUD,lookingstars/SVProgressHUD,ShyHornet/SVProgressHUD,cogddo/SVProgressHUD,zdiovo/SVProgressHUD,1yvT0s/SVProgressHUD,lyndonChen/SVProgressHUD,Dschee/SVProgressHUD