Specify namespace in Broadcast.materialize (#306)

Author: jishnub

src/blockbroadcast.jl

@@ -229,7 +229,7 @@ _removeblocks(a::Adjoint) = _removeblocks(parent(a))'
 _removeblocks(a::Transpose) = transpose(_removeblocks(parent(a)))
 _removeblocks(a::SubArray{<:Any,N,<:PseudoBlockArray}) where N = view(_removeblocks(parent(a)), map(_removeblocks, parentindices(a))...)
 _removeblocks(a) = a
-copy(bc::Broadcasted{PseudoBlockStyle{N}}) where N = PseudoBlockArray(materialize(_removeblocks(bc)), axes(bc))
+copy(bc::Broadcasted{PseudoBlockStyle{N}}) where N = PseudoBlockArray(Broadcast.materialize(_removeblocks(bc)), axes(bc))
 
 for op in (:+, :-, :*)
     @eval function copy(bc::Broadcasted{BlockStyle{N},<:Any,typeof($op),<:Tuple{<:AbstractArray{<:Number,N}}}) where N