From 6cb0be3014ecbab91f2bfa92ca7ae4058e70192b Mon Sep 17 00:00:00 2001
From: nyamatongwe <unknown>
Date: Mon, 30 Jul 2007 09:08:55 +0000
Subject: Fix bug #1760848 by ensuring undo stack level is maintained during an
 automatic load while reload.preserves.undo=1.

---
 src/CellBuffer.cxx | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/CellBuffer.cxx b/src/CellBuffer.cxx
index 1beeefc6b..6d04e04c9 100644
--- a/src/CellBuffer.cxx
+++ b/src/CellBuffer.cxx
@@ -471,6 +471,7 @@ void UndoHistory::BeginUndoAction() {
 }
 
 void UndoHistory::EndUndoAction() {
+	PLATFORM_ASSERT(undoSequenceDepth > 0);
 	EnsureUndoRoom();
 	undoSequenceDepth--;
 	if (0 == undoSequenceDepth) {
-- 
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