use sum in dim of GradedSpace

Author: borisdevos

src/spaces/gradedspace.jl

@@ -92,9 +92,7 @@ Base.hash(V::GradedSpace, h::UInt) = hash(V.dual, hash(V.dims, h))
 field(::Type{<:GradedSpace}) = ℂ
 InnerProductStyle(::Type{<:GradedSpace}) = EuclideanInnerProduct()
 function dim(V::GradedSpace)
-    T = Base.promote_op(*, Int, real(sectorscalartype(sectortype(V))))
-    return reduce(+, dim(V, c) * dim(c) for c in sectors(V);
-                  init=zero(T))
+     return sum(dim(V, c) * dim(c) for c in sectors(V))
 end
 function dim(V::GradedSpace{I, <:AbstractDict}, c::I) where {I <: Sector}
     return get(V.dims, isdual(V) ? dual(c) : c, 0)