fix ref-leak during Py2-style class instantiation
fix ref-leak during Py2-style class instantiation

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