From 417aadaeeab60c5256b8fde16509c975b3023112 Mon Sep 17 00:00:00 2001
From: eap <eap@opencascade.com>
Date: Mon, 24 Apr 2017 17:17:28 +0300
Subject: [PATCH] IPAL54097: SIGSEGV in Scalar Bar Properties dialog and crash
 in next operation

---
 src/OBJECT/SMESH_ScalarBarActor.cxx | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/src/OBJECT/SMESH_ScalarBarActor.cxx b/src/OBJECT/SMESH_ScalarBarActor.cxx
index 1f5b00b63..a45696d7e 100644
--- a/src/OBJECT/SMESH_ScalarBarActor.cxx
+++ b/src/OBJECT/SMESH_ScalarBarActor.cxx
@@ -578,15 +578,18 @@ int SMESH_ScalarBarActor::RenderOpaqueGeometry(vtkViewport *viewport)
       
       // rnv begin
       // Customization of the vtkScalarBarActor to show distribution histogram.
-      if(myDistributionColoringType == SMESH_MULTICOLOR_TYPE && GetDistributionVisibility() && distrVisibility)
-        {
-          rgb = distColors->GetPointer(3*dcCount); //write into array directly
-          rgb[0] = rgba[0];
-          rgb[1] = rgba[1];
-          rgb[2] = rgba[2];
-          dcCount++;
-        }
+      if ( myDistributionColoringType == SMESH_MULTICOLOR_TYPE &&
+           GetDistributionVisibility() &&
+           distrVisibility &&
+           myNbValues[i] > 0 )
+      {
+        rgb = distColors->GetPointer(3*dcCount); //write into array directly
+        rgb[0] = rgba[0];
+        rgb[1] = rgba[1];
+        rgb[2] = rgba[2];
+        dcCount++;
       }
+    }
 
     // Now position everything properly
     //
-- 
2.39.2