signedness fix for unicode-for-loop iteration
signedness fix for unicode-for-loop iteration

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