[#372] Quote null byte characters

- Implements a patch that ensures that null byte characters are properly quoted
  in the SQL Server adapter.

library/Zend/Db/Adapter/Sqlsrv.php

@@ -314,6 +314,7 @@ class Zend_Db_Adapter_Sqlsrv extends Zend_Db_Adapter_Abstract
             return sprintf('%F', $value);
         }
 
+        $value = addcslashes($value, "\000\032");
         return "'" . str_replace("'", "''", $value) . "'";
     }
 

tests/Zend/Db/Adapter/SqlsrvTest.php

@@ -558,4 +558,15 @@ class Zend_Db_Adapter_SqlsrvTest extends Zend_Db_Adapter_TestCommon
     {
         return 'Sqlsrv';
     }
+
+    /**
+     * test that quote() escapes null byte character
+     * in a string.
+     */
+    public function testAdapterQuoteNullByteCharacter()
+    {
+        $string = "1\0";
+        $value  = $this->_db->quote($string);
+        $this->assertEquals("'1\\000'", $value);
+    }
 }