empty array can't be exported to JSON

[cserteGT3]

julia> using RANSAC

julia> exportJSON(stdout, [])
ERROR: MethodError: no method matching toDict(::Array{Any,1})
Closest candidates are:
  toDict(::FittedShape) at C:\Users\Laci\.julia\dev\RANSAC\src\json.jl:10
  toDict(::ShapeCandidate) at C:\Users\Laci\.julia\dev\RANSAC\src\json.jl:18
  toDict(::ScoredShape) at C:\Users\Laci\.julia\dev\RANSAC\src\json.jl:20
  ...
Stacktrace:
 [1] exportJSON(::Base.TTY, ::Array{Any,1}) at C:\Users\Laci\.julia\dev\RANSAC\src\json.jl:58
 [2] top-level scope at REPL[2]:1

[cserteGT3]

An empty array of FittedShape ,etc works:

julia> using RANSAC

julia> exportJSON(stdout, ScoredShape[])
{"primitives":[]}
julia> exportJSON(stdout, FittedShape[])
{"primitives":[]}
julia> exportJSON(stdout, ShapeCandidate[])
{"primitives":[]}