make 0.3 compatible

Author: SimonDanisch

src/query.jl

@@ -49,7 +49,7 @@ function add_format{sym}(fmt::Type{DataFormat{sym}}, magic::Union(Tuple,Abstract
 end
 
 # for multiple magic bytes
-function add_format{sym, T <: Vector{Uint8}}(fmt::Type{DataFormat{sym}}, magics::Tuple{T, Vararg{T}}, extension)
+function add_format{sym, T <: Vector{Uint8}, N}(fmt::Type{DataFormat{sym}}, magics::NTuple{N, T}, extension)
     haskey(sym2info, sym) && error("format ", fmt, " is already registered")
     magics = map(canonicalize_magic, magics)
     for magic in magics