# HG changeset patch
# User hegyi
# Date 1123452899 0
# Node ID c17d61f773193ec2268fb8b956af9463d08ba20e
# Parent  78704393218db460b99cb06e56c7bfefc1e95bfa
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 78704393218d -r c17d61f77319 gui/mapstorage.cc
--- a/gui/mapstorage.cc	Sun Aug 07 18:06:41 2005 +0000
+++ b/gui/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 )