From 53eaae006a7c1f12f909286a123f08078631dd7f Mon Sep 17 00:00:00 2001
From: Ray Speth <speth@mit.edu>
Date: Mon, 9 Jan 2012 17:35:02 +0000
Subject: [PATCH] Fixed illegal access to empty vector in MultiPhaseEquil
 constructor

---
 Cantera/src/equil/MultiPhaseEquil.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Cantera/src/equil/MultiPhaseEquil.cpp b/Cantera/src/equil/MultiPhaseEquil.cpp
index 5db25c3ba..993195ceb 100644
--- a/Cantera/src/equil/MultiPhaseEquil.cpp
+++ b/Cantera/src/equil/MultiPhaseEquil.cpp
@@ -181,8 +181,10 @@ namespace Cantera {
         // Take a very small step in composition space, so that no
         // species has precisely zero moles.
         vector_fp dxi(m_nsp - m_nel, 1.0e-20);
-        multiply(m_N, DATA_PTR(dxi), DATA_PTR(m_work));
-        unsort(m_work);
+        if (!dxi.empty()) {
+          multiply(m_N, DATA_PTR(dxi), DATA_PTR(m_work));
+          unsort(m_work);
+        }
 
         for (k = 0; k < m_nsp; k++) {
             m_moles[k] += m_work[k];