fix reference leak
fix reference leak

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