fix C compiler warning about unused variable
fix C compiler warning about unused variable

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