From 7777a8ee07b8499718b202545a29cc41a6f9059f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Atgeirr=20Fl=C3=B8=20Rasmussen?= <atgeirr@sintef.no>
Date: Mon, 26 Mar 2012 14:20:00 +0200
Subject: [PATCH] Bugfix in solveMultiCell().

---
 opm/core/transport/reorder/TransportModelTwophase.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/opm/core/transport/reorder/TransportModelTwophase.cpp b/opm/core/transport/reorder/TransportModelTwophase.cpp
index 7d9aadac0..70d9876ec 100644
--- a/opm/core/transport/reorder/TransportModelTwophase.cpp
+++ b/opm/core/transport/reorder/TransportModelTwophase.cpp
@@ -362,7 +362,9 @@ namespace Opm
 		    for (int j = ia_downw_[cell]; j < ia_downw_[cell+1]; ++j) {
 			const int downwind_cell = ja_downw_[j];
 			int ci = pos[downwind_cell];
-			needs_update[ci] = 1;
+                        if (ci != -1) {
+                            needs_update[ci] = 1;
+                        }
 			// ++needs_update[ci];
 			// if (needs_update[ci] == num_upstream[ci]) {
 			//     fully_marked_stack.push_back(ci);