fix python2.4 issue
fix python2.4 issue

--HG--
branch : trunk

userzimmermann/pytest,ghostsquad/pytest,hpk42/pytest,Bjwebb/pytest,ghostsquad/pytest,Carreau/pytest,hunse/pytest,icemac/pytest,omarkohl/pytest,Bjwebb/pytest,flub/pytest,pelme/pytest,eli-b/pytest,inirudebwoy/pytest,bukzor/pytest,ojake/pytest,pytest-dev/py,The-Compiler/pytest,lukas-bednar/pytest,bubenkoff/pytest,ericdill/pytest,MengJueM/pytest,davidszotten/pytest,nicoddemus/repo-test,mdboom/pytest,mbirtwell/pytest,Magicjarvis/py,pytest-dev/pytest,oleg-alexandrov/pytest,mhils/pytest,ropez/pytest,gabrielcnr/pytest,abusalimov/pytest,vodik/pytest,bukzor/pytest,inirudebwoy/pytest,txomon/pytest,The-Compiler/pytest,chillbear/pytest,skylarjhdownes/pytest,vmalloc/dessert,alfredodeza/pytest,etataurov/pytest,Bachmann1234/pytest,rmfitzpatrick/pytest,codewarrior0/pytest,markshao/pytest,ddboline/pytest,wfxiang08/pytest,untitaker/pytest,chillbear/pytest,untitaker/pytest,abusalimov/pytest,rouge8/pytest,mbirtwell/pytest,lukas-bednar/pytest,mdboom/pytest,ionelmc/pytest,wfxiang08/pytest,Carreau/pytest,codewarrior0/pytest,ropez/pytest,jb098/pytest,takluyver/pytest,Akasurde/pytest,oleg-alexandrov/pytest,pfctdayelise/pytest,tomviner/pytest,JonathonSonesen/pytest,mhils/pytest,jaraco/pytest,Bachmann1234/pytest,ionelmc/pytest,MengJueM/pytest,JonathonSonesen/pytest,icemac/pytest,RonnyPfannschmidt/pytest,pelme/pytest,gabrielcnr/pytest,nicoddemus/repo-test,malinoff/pytest,tgoodlet/pytest,doordash/pytest,Haibo-Wang-ORG/pytest,ericdill/pytest,chiller/pytest,rouge8/pytest,userzimmermann/pytest,Haibo-Wang-ORG/pytest,nicoddemus/pytest,tomviner/pytest,jb098/pytest,omarkohl/pytest,vodik/pytest,MichaelAquilina/pytest,chiller/pytest,nicoddemus/pytest,tareqalayan/pytest,doordash/pytest,hpk42/pytest,hunse/pytest,hackebrot/pytest,ojake/pytest,takluyver/pytest,bubenkoff/pytest