TST: test_sparse_field_assignment now succeeds now (was xfail)
TST: test_sparse_field_assignment now succeeds now (was xfail)

There were some paths that manipulated the unused data. This was
fixed in the big refactor (or earlier), I expect there were some
fast paths for equal sized dtypes that kicked in before

jakirkham/numpy,simongibbons/numpy,simongibbons/numpy,mhvk/numpy,pbrod/numpy,pdebuyl/numpy,mhvk/numpy,pdebuyl/numpy,anntzer/numpy,anntzer/numpy,jakirkham/numpy,charris/numpy,mhvk/numpy,pbrod/numpy,mattip/numpy,anntzer/numpy,numpy/numpy,numpy/numpy,pbrod/numpy,jakirkham/numpy,endolith/numpy,charris/numpy,seberg/numpy,rgommers/numpy,endolith/numpy,numpy/numpy,charris/numpy,mattip/numpy,rgommers/numpy,rgommers/numpy,pbrod/numpy,mhvk/numpy,mhvk/numpy,simongibbons/numpy,pdebuyl/numpy,endolith/numpy,seberg/numpy,pbrod/numpy,endolith/numpy,simongibbons/numpy,rgommers/numpy,jakirkham/numpy,mattip/numpy,mattip/numpy,numpy/numpy,pdebuyl/numpy,jakirkham/numpy,seberg/numpy,charris/numpy,anntzer/numpy,seberg/numpy,simongibbons/numpy