Update hz_linesearch.jl
Update hz_linesearch.jl

A call to error had a seemingly unintended capitalization.
matthieugomez/Optim.jl,yuyichao/Optim.jl,yuyichao/Optim.jl,pkofod/Optim.jl,zhmz90/Optim.jl,pkofod/Optim.jl,KristofferC/Optim.jl,JuliaPackageMirrors/Optim.jl,matthieugomez/Optim.jl,JuliaPackageMirrors/Optim.jl,zhmz90/Optim.jl,KristofferC/Optim.jl