From ed29d8ef9ab1c2cd11abe6cba0a901a64092ff4f Mon Sep 17 00:00:00 2001
From: Eivind Kvedalen <eivind@kvedalen.name>
Date: Sat, 16 Jan 2016 00:34:42 +0100
Subject: [PATCH] Spreadsheet: Fixed crash when removing aliases.

---
 src/Mod/Spreadsheet/App/PropertySheet.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Mod/Spreadsheet/App/PropertySheet.cpp b/src/Mod/Spreadsheet/App/PropertySheet.cpp
index 732a1305d..5f1eab36c 100644
--- a/src/Mod/Spreadsheet/App/PropertySheet.cpp
+++ b/src/Mod/Spreadsheet/App/PropertySheet.cpp
@@ -477,7 +477,7 @@ void PropertySheet::setAlias(CellAddress address, const std::string &alias)
 
     cell->setAlias(alias);
 
-    if (oldAlias.size() > 0) {
+    if (oldAlias.size() > 0 && alias.size() > 0) {
         std::map<App::ObjectIdentifier, App::ObjectIdentifier> m;
 
         m[App::ObjectIdentifier(owner, oldAlias)] = App::ObjectIdentifier(owner, alias);