Fix for issue #45 on Google Code

https://code.google.com/p/pypyodbc/issues/detail?id=45

pypyodbc.py

@@ -1755,7 +1755,7 @@ def _UpdateDesc(self):
                 if ret != SQL_SUCCESS:
                     check_success(self, ret)
 
-            col_name = Cname.value
+            col_name = from_buffer_u(Cname)
             if lowercase:
                 col_name = col_name.lower()
             #(name, type_code, display_size,