Fix error in MSSQL update script 2013061000.sql (#1490061)

CHANGELOG

@@ -14,6 +14,7 @@ CHANGELOG Roundcube Webmail
 - Fix contacts list update after adding/deleting/moving a contact (#1490028, #1490033)
 - Fix handling of email addresses with quoted domain part (#1490040)
 - Fix comm_path update on task switch (#1490041)
+- Fix error in MSSQL update script 2013061000.sql (#1490061)
 
 RELEASE 1.0.2
 -------------

SQL/mssql/2013061000.sql

@@ -1,12 +1,12 @@
-ALTER TABLE [dbo].[cache] ADD COLUMN [expires] [datetime] NULL
+ALTER TABLE [dbo].[cache] ADD [expires] [datetime] NULL
 GO
-ALTER TABLE [dbo].[cache_shared] ADD COLUMN [expires] [datetime] NULL
+ALTER TABLE [dbo].[cache_shared] ADD [expires] [datetime] NULL
 GO
-ALTER TABLE [dbo].[cache_index] ADD COLUMN [expires] [datetime] NULL
+ALTER TABLE [dbo].[cache_index] ADD [expires] [datetime] NULL
 GO
-ALTER TABLE [dbo].[cache_thread] ADD COLUMN [expires] [datetime] NULL
+ALTER TABLE [dbo].[cache_thread] ADD [expires] [datetime] NULL
 GO
-ALTER TABLE [dbo].[cache_messages] ADD COLUMN [expires] [datetime] NULL
+ALTER TABLE [dbo].[cache_messages] ADD [expires] [datetime] NULL
 GO
 
 UPDATE [dbo].[cache] SET [expires] = DATEADD(second, 604800, [created])