add index-less values()

Author: alyst

src/primitives.jl

@@ -2,6 +2,7 @@ Base.isnull(x::NullableArray) = x.isnull
 @inline Base.isnull(X::NullableArray, I::Int...) = X.isnull[I...]
 @inline Base.isnull{T}(X::AbstractNullableArray{T}, I::Int...) = isnull(X[I...]) # fallback method
 
+Base.values(X::NullableArray) = X.values
 @inline Base.values(X::NullableArray, I::Int...) = X.values[I...]
 
 """