DOC: fix invalid C code in NEP 10
DOC: fix invalid C code in NEP 10

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