fix crashes when deallocating instances of cimported types after module cleanup, patch by Lisandro Dalcin
fix crashes when deallocating instances of cimported types after module cleanup, patch by Lisandro Dalcin

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