bug-fix

src/juobs_tools.jl

@@ -1282,7 +1282,7 @@ It returns a NamedTuple with names:
   - `:pval`:   pvalue 
 """
 function fit_routine(model::Function,
-  xdata::Array{<:Real},
+  xdata::AbstractArray{<:Real},
   ydata::Array{uwreal}, 
   npar::Int64; 
   wpm::Union{Dict{Int64,Vector{Float64}},Dict{String,Vector{Float64}}}=Dict{Int64,Vector{Float64}}(),
@@ -1290,7 +1290,7 @@ function fit_routine(model::Function,
   W::AbstractVecOrMat{Float64}=Vector{Float64}(),
   guess::Vector{Float64} = fill(0.5,npar),
   logfile = nothing,
-  C::AbstractMatrix{Float64} = Matrix{Float64}());
+  C::AbstractMatrix{Float64} = Matrix{Float64}(undef,0,0));
 
   nobs = length(ydata)
   if length(xdata)!=nobs