# HG changeset patch
# User hegyi
# Date 1123452899 0
# Node ID a27ab230a1787955c679391fa0535e543c8053b7
# Parent  1f158566c3bfa4a546b044e991cf820ab8880070
Until this commitment gui gave us segmentation fault in the case when no element was on graph_displayer_canvas and a map to visualize by a property has been changed.

diff -r 1f158566c3bf -r a27ab230a178 mapstorage.cc
--- a/mapstorage.cc	Sun Aug 07 18:06:41 2005 +0000
+++ b/mapstorage.cc	Sun Aug 07 22:14:59 2005 +0000
@@ -74,7 +74,15 @@
 double MapStorage::minOfNodeMap(const std::string & name)
 {
   NodeIt j(graph);
-  double min=(*nodemap_storage[name])[j];
+  double min;
+  if(j!=INVALID)
+    {
+      min=(*nodemap_storage[name])[j];
+    }
+  else
+    {
+      min=0;
+    }
   for (; j!=INVALID; ++j)
   {
     if( (*nodemap_storage[name])[j]<min )
@@ -88,7 +96,15 @@
 double MapStorage::minOfEdgeMap(const std::string & name)
 {
   EdgeIt j(graph);
-  double min=(*edgemap_storage[name])[j];
+  double min;
+  if(j!=INVALID)
+    {
+      min=(*edgemap_storage[name])[j];
+    }
+  else
+    {
+      min=0;
+    }
   for (EdgeIt j(graph); j!=INVALID; ++j)
   {
     if( (*edgemap_storage[name])[j]<min )