diff -r 4ca5a537ef07 -r 052cfd7832b1 mapstorage.cc
--- a/mapstorage.cc	Fri Aug 26 07:35:23 2005 +0000
+++ b/mapstorage.cc	Fri Aug 26 10:46:51 2005 +0000
@@ -245,14 +245,16 @@
     }
     else
     {
-      EdgeIt e(graph);
-      double max = (*edgemap_storage["id"])[e];
-      for (; e != INVALID; ++e)
+      double max = std::numeric_limits<double>::min();
+      for (EdgeIt e(graph); e != INVALID; ++e)
       {
         if ((*edgemap_storage["id"])[e] > max)
           max = (*edgemap_storage["id"])[e];
       }
-      edgemap_default["id"] = max + 1.0;
+      if (max > std::numeric_limits<double>::min())
+        edgemap_default["id"] = max + 1.0;
+      else
+        edgemap_default["id"] = 1.0;
     }
   }