From fd258ffc81942324de19a977d3a28473a4bca25a Mon Sep 17 00:00:00 2001
From: wp <wp.no-reply@lazarus-ide-org>
Date: Thu, 14 May 2015 10:54:48 +0000
Subject: [PATCH] TAChart: Fix crash of IDE if TPieSeries is linked to a
 TUserDefinedChartSource

git-svn-id: trunk@49019 -
---
 components/tachart/taradialseries.pas | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/components/tachart/taradialseries.pas b/components/tachart/taradialseries.pas
index c40957f7f1..3cf2adb6df 100644
--- a/components/tachart/taradialseries.pas
+++ b/components/tachart/taradialseries.pas
@@ -499,6 +499,8 @@ begin
   // This is a workaround for db source invalidating the cache due to
   // unnecessary "dataset changed" events.
   total := Source.ValuesTotal;
+  if total = 0 then
+    exit;
   for i := 0 to Count - 1 do begin
     di := Source[i];
     if IsNan(di^.Y) then continue;