WARNING: [a] concatenation is deprecated

[maxruby]

I realize that this is an ongoing Julia v0.4 issue #10290, but can one disable the deprecation WARNINGS below easily in Cxx.jl?

julia> using Cxx
julia> cxx""" #include<iostream> """
julia> cxx"""  
                void mycppfunction() {   
                   int z = 0;
                   int y = 5;
                   int x = 10;
                   z = x*y + 2;
                   std::cout << "The number is " << z << std::endl;
                }
             """
julia> julia_function() = @cxx mycppfunction()
julia_function (generic function with 1 method)

julia> julia_function()
WARNING: [a] concatenation is deprecated; use [a;] instead
 in depwarn at ./deprecated.jl:40
 in oldstyle_vcat_warning at ./abstractarray.jl:26
The number is 52