Fix refernce-returning, exception-throwing functions.
Fix refernce-returning, exception-throwing functions.

Their temporaries can't be references.

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