Update infbanded.jl

Author: dlfivefifty

src/banded/infbanded.jl

@@ -536,4 +536,12 @@ Base.typed_hcat(::Type{T}, A::BandedMatrix{<:Any,<:Any,OneToInf{Int}}, B::Abstra
 # SymTriPertToeplitz
 ###
 
-MemoryLayout(::Type{<:SymTriPertToeplitz}) = PertTridiagonalToeplitzLayout()
+MemoryLayout(::Type{<:SymTriPertToeplitz}) = PertTridiagonalToeplitzLayout()
+
+
+####
+# Banded, TODO: move to extension in InfiniteArrays.jl
+###
+
+sublayout(::ApplyBandedLayout, ::Type{<:Tuple{KR,Integer}}) where {KR<:InfAxes} =
+    sublayout(PaddedColumns{UnknownLayout}(), Tuple{KR})