BENCH: use initialized memory for count_nonzero benchmark
BENCH: use initialized memory for count_nonzero benchmark

For the bool case uninitialized memory can randomly go into the slow
path handling values different than 0 or 1.

simongibbons/numpy,mattip/numpy,solarjoe/numpy,mattip/numpy,grlee77/numpy,jakirkham/numpy,b-carter/numpy,endolith/numpy,bringingheavendown/numpy,pbrod/numpy,rgommers/numpy,shoyer/numpy,abalkin/numpy,madphysicist/numpy,mhvk/numpy,simongibbons/numpy,rgommers/numpy,jakirkham/numpy,pizzathief/numpy,grlee77/numpy,WarrenWeckesser/numpy,pizzathief/numpy,ahaldane/numpy,charris/numpy,pbrod/numpy,solarjoe/numpy,jorisvandenbossche/numpy,grlee77/numpy,mhvk/numpy,jakirkham/numpy,pbrod/numpy,anntzer/numpy,MSeifert04/numpy,jorisvandenbossche/numpy,behzadnouri/numpy,madphysicist/numpy,jorisvandenbossche/numpy,numpy/numpy,charris/numpy,numpy/numpy,charris/numpy,madphysicist/numpy,jakirkham/numpy,madphysicist/numpy,mhvk/numpy,jakirkham/numpy,anntzer/numpy,simongibbons/numpy,seberg/numpy,gfyoung/numpy,MSeifert04/numpy,chatcannon/numpy,bringingheavendown/numpy,pdebuyl/numpy,pdebuyl/numpy,jorisvandenbossche/numpy,pizzathief/numpy,abalkin/numpy,pizzathief/numpy,mhvk/numpy,WarrenWeckesser/numpy,solarjoe/numpy,WarrenWeckesser/numpy,charris/numpy,numpy/numpy,pdebuyl/numpy,WarrenWeckesser/numpy,shoyer/numpy,Eric89GXL/numpy,mhvk/numpy,grlee77/numpy,simongibbons/numpy,behzadnouri/numpy,pdebuyl/numpy,behzadnouri/numpy,gfyoung/numpy,chatcannon/numpy,pbrod/numpy,madphysicist/numpy,endolith/numpy,Eric89GXL/numpy,abalkin/numpy,seberg/numpy,WarrenWeckesser/numpy,bringingheavendown/numpy,Eric89GXL/numpy,shoyer/numpy,ahaldane/numpy,b-carter/numpy,b-carter/numpy,seberg/numpy,tynn/numpy,ahaldane/numpy,numpy/numpy,tynn/numpy,mattip/numpy,simongibbons/numpy,pbrod/numpy,gfyoung/numpy,MSeifert04/numpy,ahaldane/numpy,anntzer/numpy,endolith/numpy,jorisvandenbossche/numpy,shoyer/numpy,tynn/numpy,pizzathief/numpy,rgommers/numpy,chatcannon/numpy,mattip/numpy,anntzer/numpy,Eric89GXL/numpy,rgommers/numpy,endolith/numpy,MSeifert04/numpy,shoyer/numpy,MSeifert04/numpy,seberg/numpy,grlee77/numpy,ahaldane/numpy