diff -r d2915690047f -r 40c379697ebf master/slave_config.c
--- a/master/slave_config.c	Wed Mar 19 10:51:18 2008 +0000
+++ b/master/slave_config.c	Mon Mar 31 09:42:37 2008 +0000
@@ -582,6 +582,10 @@
 
     for (i = 0; i < n_infos; i++) {
         pi = &pdo_infos[i];
+
+        if (pi->dir == EC_MAP_END)
+            break;
+
         pm = &sc->mapping[pi->dir];
 
         if (pm->default_mapping) {