From 539b70c28091a7cdfc0abe106102a151f075e6ef Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Sat, 23 May 2015 16:09:54 +0200
Subject: Test BLOB container is not empty before calling front()

---
 odb/mssql/traits.cxx | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/odb/mssql/traits.cxx b/odb/mssql/traits.cxx
index 97ec318..f089803 100644
--- a/odb/mssql/traits.cxx
+++ b/odb/mssql/traits.cxx
@@ -496,7 +496,7 @@ namespace odb
     {
       const value_type& v (*static_cast<const value_type*> (context));
 
-      *buffer = &v.front ();
+      *buffer = v.empty () ? 0 : &v.front ();
       *size = v.size ();
       *chunk = chunk_one;
     }
@@ -566,7 +566,7 @@ namespace odb
     {
       const value_type& v (*static_cast<const value_type*> (context));
 
-      *buffer = &v.front ();
+      *buffer = v.empty () ? 0 : &v.front ();
       *size = v.size ();
       *chunk = chunk_one;
     }
-- 
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