Update src/disjoint_set.jl

Co-authored-by: Frames White <oxinabox@ucc.asn.au>

Author: amontoison

src/disjoint_set.jl

@@ -182,8 +182,7 @@ Base.empty(s::DisjointSet{T}, ::Type{U}=T) where {T,U} = DisjointSet{U}()
 function Base.sizehint!(s::DisjointSet, n::Integer)
     sizehint!(s.intmap, n)
     sizehint!(s.revmap, n)
-    sizehint!(s.internal.parents, n)
-    sizehint!(s.internal.ranks, n)
+    sizehint!(s.internal, n)
     return s
 end