From 9f2b024ebbb2136788869f41de5223ac27557ada Mon Sep 17 00:00:00 2001
From: apl <apl@opencascade.com>
Date: Fri, 15 Feb 2013 07:35:46 +0000
Subject: [PATCH] string value cache fails when user enters empty value

---
 src/QDS/QDS_Datum.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/QDS/QDS_Datum.cxx b/src/QDS/QDS_Datum.cxx
index 177992b0e..12f90b3c1 100644
--- a/src/QDS/QDS_Datum.cxx
+++ b/src/QDS/QDS_Datum.cxx
@@ -585,7 +585,7 @@ QString QDS_Datum::stringValue() const
 {
   initDatum();
 
-  if ( getString() == myTargetValue )
+  if ( !myTargetValue.isNull() && myTargetValue == getString() )
     return mySourceValue;
   else
     return getString();
-- 
2.39.2