Bad error message when calling keyword-less constructors with keywords

[mauro3]

This is confusing (on 0.5, but similarly confusing on 0.4):

julia> type A end

julia> A(t=7)
ERROR: MethodError: no method matching (::Core.#kw#Type)(::Array{Any,1}, ::Type{A})
Closest candidates are:
  Type(::Array{Any,1}, ::Type{Base.LibGit2.FetchOptions})
  Type(::Array{Any,1}, ::Type{Base.LibGit2.CloneOptions})
  Type(::Array{Any,1}, ::Type{Base.LibGit2.DiffOptionsStruct})
  ...
 in eval(::Module, ::Any) at ./boot.jl:234
 in macro expansion at ./REPL.jl:92 [inlined]
 in (::Base.REPL.##1#2{Base.REPL.REPLBackend})() at ./event.jl:46

whereas for functions the error is good:

julia> f(x) = x
f (generic function with 1 method)

julia> f(t=5)
ERROR: ArgumentError: function f does not accept keyword arguments

[JeffBezanson]

Fixed by #16669