Fix bug average energy of Uninformative type

Author: mhidalgoaraya

src/nodes/predefined/uninformative.jl

@@ -4,7 +4,7 @@ struct Uninformative end
 
 @node Uninformative Stochastic [out]
 
-@average_energy Uninformative (q_out::Any,) = entropy(q_out)
+@average_energy Uninformative (q_out::Any,) = zero(paramfloattype(q_out))
 
 function BayesBase.default_prod_rule(::Type{<:Uninformative}, ::Type{T}) where {T}
     return PreserveTypeProd(T)