Bug #29476 NullException thrown when connecting to a 4.0.27 server

Description:
Attempt to connect to a pre 4.1 server, and the following exception is thrown in MySqlField.CheckForExceptions (Field.cs):  

NullException - Object reference not set to an instance of an object

How to repeat:
Attempt to connect to a pre 4.1 server will throw the exception in MySqlField.CheckForExceptions.

Suggested fix:
Currently OriginalColumnName is set only by GetFieldMetaData41. Here is my modification for CheckForExceptions:
Index: Field.cs
===================================================================
--- Field.cs	(revision 774)
+++ Field.cs	(working copy)
@@ -234,8 +234,10 @@
 
         private void CheckForExceptions()
         {
-            string colName = OriginalColumnName.ToLower(CultureInfo.InvariantCulture);
-            if (colName.StartsWith("char("))
+            string colName = null;
+            if (OriginalColumnName != null)
+                colName = OriginalColumnName.ToLower(CultureInfo.InvariantCulture);
+            if (colName != null && colName.StartsWith("char("))
                 binaryOk = false;
             else if (connection.IsExecutingBuggyQuery)
                 binaryOk = false;

Hi Ellery and thanks for your report. 

Verified as described by reporter:
 - MySQL server 4.0.30pro on WinXP Pro SP2 localhost
 - c/NET 5.1.2 SVN (latest sources) on NET fw 2.0

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/32403

Fixed in 5.1.3

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/32645

A note has been added to the 5.1.3 changelog: 

Connecting to a MySQL server earlier than version 4.1 would raise a NullException.