MAINT: Push down declarations in _convert_from_tuple
MAINT: Push down declarations in _convert_from_tuple

Note that in order to not reference a declaration after `goto`ing past it, one DECREF moved out of `fail` and inline.

seberg/numpy,simongibbons/numpy,jakirkham/numpy,pbrod/numpy,seberg/numpy,jakirkham/numpy,grlee77/numpy,simongibbons/numpy,mattip/numpy,madphysicist/numpy,pbrod/numpy,anntzer/numpy,grlee77/numpy,numpy/numpy,pdebuyl/numpy,pdebuyl/numpy,anntzer/numpy,charris/numpy,mhvk/numpy,pdebuyl/numpy,abalkin/numpy,WarrenWeckesser/numpy,seberg/numpy,mattip/numpy,simongibbons/numpy,pbrod/numpy,abalkin/numpy,madphysicist/numpy,madphysicist/numpy,mhvk/numpy,WarrenWeckesser/numpy,jakirkham/numpy,grlee77/numpy,mhvk/numpy,charris/numpy,grlee77/numpy,simongibbons/numpy,WarrenWeckesser/numpy,numpy/numpy,abalkin/numpy,jakirkham/numpy,pbrod/numpy,mhvk/numpy,endolith/numpy,pbrod/numpy,mattip/numpy,grlee77/numpy,anntzer/numpy,rgommers/numpy,endolith/numpy,simongibbons/numpy,WarrenWeckesser/numpy,mattip/numpy,endolith/numpy,charris/numpy,endolith/numpy,rgommers/numpy,pdebuyl/numpy,rgommers/numpy,jakirkham/numpy,seberg/numpy,WarrenWeckesser/numpy,rgommers/numpy,anntzer/numpy,numpy/numpy,numpy/numpy,mhvk/numpy,madphysicist/numpy,madphysicist/numpy,charris/numpy