Missing Data Types In DataDict For MsSql

There are some missing data types in the getPortableDeclaration function for MsSql. The following diff adds the types I found missing so far.

Thanks,
Mike

diff -r doctrine\lib\Doctrine\DataDict\Mssql.php Doctrine-1.1.2\lib\Doctrine\DataDict\Mssql.php
193,202d192
< case 'uniqueidentifier':
< $type[] = 'string';
< $length = 36;
< break;
< case 'sql_variant':
< case 'sysname':
< case 'binary':
< $type[] = 'string';
< $length = null;
< break;