From 63282590b70f29e96c5f0f7d0db30ca48c9e0fa5 Mon Sep 17 00:00:00 2001
From: mquinson <mquinson@48e7efb5-ca39-0410-a469-dd3cf9ba447f>
Date: Wed, 6 Jun 2007 15:30:12 +0000
Subject: [PATCH] the matrix may have 0 columns...

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/simgrid/simgrid/trunk@3574 48e7efb5-ca39-0410-a469-dd3cf9ba447f
---
 src/xbt/xbt_str.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/xbt/xbt_str.c b/src/xbt/xbt_str.c
index 83deab85e5..7ff082793a 100644
--- a/src/xbt/xbt_str.c
+++ b/src/xbt/xbt_str.c
@@ -453,6 +453,7 @@ static xbt_matrix_t diff_build_LCS(xbt_dynar_t da, xbt_dynar_t db) {
   xbt_matrix_t C = xbt_matrix_new(xbt_dynar_length(da),xbt_dynar_length(db),
 				  sizeof(int),NULL); 
   int i,j;
+
   /* Compute the LCS */
   /*
     C = array(0..m, 0..n)
@@ -471,8 +472,9 @@ static xbt_matrix_t diff_build_LCS(xbt_dynar_t da, xbt_dynar_t db) {
   for (i=0; i<xbt_dynar_length(da); i++) 
     *((int*) xbt_matrix_get_ptr(C,i,0) ) = 0;
 
-  for (j=0; j<xbt_dynar_length(db); j++) 
-    *((int*) xbt_matrix_get_ptr(C,0,j) ) = 0;
+  if (xbt_dynar_length(da) != 0)
+    for (j=0; j<xbt_dynar_length(db); j++) 
+      *((int*) xbt_matrix_get_ptr(C,0,j) ) = 0;
 
   for (i=1; i<xbt_dynar_length(da); i++) 
     for (j=1; j<xbt_dynar_length(db); j++) {
-- 
2.20.1