From 0c617750a63436709816ee83a4028262755d43e0 Mon Sep 17 00:00:00 2001
From: John Lapeyre <john.lapeyre@gmail.com>
Date: Fri, 12 Dec 2014 18:50:07 +0100
Subject: [PATCH] fix empty list case

---
 src/PermPlain.jl | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/PermPlain.jl b/src/PermPlain.jl
index 11e542f..4ce0205 100644
--- a/src/PermPlain.jl
+++ b/src/PermPlain.jl
@@ -517,6 +517,7 @@ end
 function listtosparse{T<:Real}(p::AbstractVector{T})
     data = Dict{T,T}()
     maxk = zero(T)
+    length(p) == 0 && return (data,maxk)
     for i in p
         pv = p[i]
         if pv != i