fix C compiler warning in Py2.4
fix C compiler warning in Py2.4

mcanthony/cython,achernet/cython,hhsprings/cython,andreasvc/cython,marscher/cython,ABcDexter/cython,fperez/cython,slonik-az/cython,andreasvc/cython,cython/cython,c-blake/cython,mrGeen/cython,scoder/cython,achernet/cython,marscher/cython,roxyboy/cython,encukou/cython,mcanthony/cython,madjar/cython,mcanthony/cython,hhsprings/cython,achernet/cython,roxyboy/cython,c-blake/cython,acrispin/cython,hhsprings/cython,cython/cython,JelleZijlstra/cython,fperez/cython,encukou/cython,achernet/cython,acrispin/cython,JelleZijlstra/cython,hickford/cython,slonik-az/cython,scoder/cython,madjar/cython,da-woods/cython,slonik-az/cython,madjar/cython,madjar/cython,mrGeen/cython,hhsprings/cython,andreasvc/cython,marscher/cython,JelleZijlstra/cython,c-blake/cython,fabianrost84/cython,dahebolangkuan/cython,mrGeen/cython,dahebolangkuan/cython,hickford/cython,fabianrost84/cython,hickford/cython,mrGeen/cython,scoder/cython,fperez/cython,JelleZijlstra/cython,cython/cython,ChristopherHogan/cython,hickford/cython,mrGeen/cython,c-blake/cython,roxyboy/cython,ABcDexter/cython,fabianrost84/cython,andreasvc/cython,da-woods/cython,hickford/cython,fabianrost84/cython,roxyboy/cython,ABcDexter/cython,encukou/cython,andreasvc/cython,roxyboy/cython,madjar/cython,ChristopherHogan/cython,ChristopherHogan/cython,acrispin/cython,fperez/cython,da-woods/cython,mcanthony/cython,cython/cython,dahebolangkuan/cython,marscher/cython,scoder/cython,dahebolangkuan/cython,mcanthony/cython,JelleZijlstra/cython,encukou/cython,ABcDexter/cython,marscher/cython,acrispin/cython,achernet/cython,fabianrost84/cython,acrispin/cython,hhsprings/cython,encukou/cython,ABcDexter/cython,da-woods/cython,slonik-az/cython,slonik-az/cython,fperez/cython,dahebolangkuan/cython,c-blake/cython