From 5bfe04b4d0f9490c13e062f2f02a4b096fcd5795 Mon Sep 17 00:00:00 2001
From: treectrl <treectrl>
Date: Wed, 8 Oct 2008 19:22:11 +0000
Subject: Fixed [Bug 1915466] panic in Range_ItemUnderPoint thanks to Mats
 Bengtsson (I think) who submitted the fix.

---
 generic/tkTreeDisplay.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/generic/tkTreeDisplay.c b/generic/tkTreeDisplay.c
index fcdf58e..8ad6c09 100644
--- a/generic/tkTreeDisplay.c
+++ b/generic/tkTreeDisplay.c
@@ -5,7 +5,7 @@
  *
  * Copyright (c) 2002-2008 Tim Baker
  *
- * RCS: @(#) $Id: tkTreeDisplay.c,v 1.86 2008/07/21 18:42:54 treectrl Exp $
+ * RCS: @(#) $Id: tkTreeDisplay.c,v 1.87 2008/10/08 19:22:11 treectrl Exp $
  */
 
 #include "tkTreeCtrl.h"
@@ -997,7 +997,7 @@ Increment_AddX(
     TreeDInfo dInfo = tree->dInfo;
     int visWidth = Tree_ContentWidth(tree);
 
-    while ((visWidth > 1) &&
+    while ((visWidth > 1) && (dInfo->xScrollIncrementCount > 0) &&
 	    (offset - dInfo->xScrollIncrements[dInfo->xScrollIncrementCount - 1]
 		    > visWidth)) {
 	size = Increment_AddX(tree,
@@ -1040,7 +1040,7 @@ Increment_AddY(
     TreeDInfo dInfo = tree->dInfo;
     int visHeight = Tree_ContentHeight(tree);
 
-    while ((visHeight > 1) &&
+    while ((visHeight > 1) && (dInfo->yScrollIncrementCount > 0) &&
 	    (offset - dInfo->yScrollIncrements[dInfo->yScrollIncrementCount - 1]
 		    > visHeight)) {
 	size = Increment_AddY(tree,
-- 
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