From c40b8d680bacbe7bd6ef440b26f76c99c8c81e18 Mon Sep 17 00:00:00 2001
From: "rosenfield.albert"
 <rosenfield.albert@40cadd2d-89a2-4482-8f20-0232d845d7e3>
Date: Wed, 25 Jun 2008 13:05:16 +0000
Subject: [PATCH] Bugfix: Setting a field to an empty string causes a
 WriteBuffer(nil, 0) which in turn apparently causes Memory to be nil. 
 Therefore, interpret this as empty string rather than NULL.  Fixes issue
 #316.

---
 components/zeosdbo/src/component/ZStreamBlob.pas | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/components/zeosdbo/src/component/ZStreamBlob.pas b/components/zeosdbo/src/component/ZStreamBlob.pas
index ac51e65b..3ddda1d8 100644
--- a/components/zeosdbo/src/component/ZStreamBlob.pas
+++ b/components/zeosdbo/src/component/ZStreamBlob.pas
@@ -115,7 +115,7 @@ begin
   begin
     if Assigned(Self.Memory) then
       Blob.SetStream(Self)
-    else Blob.SetStream(nil);
+    else Blob.SetString('');
     try
       if Assigned(FField.Dataset) then
         THackedDataset(FField.DataSet).DataEvent(deFieldChange, LongInt(FField));