MS SQL: Fix collation issues when retrieving default values

I was getting this error:
Error in query (4189): Cannot convert to text/ntext or collate to 'Czech_100_CI_AI_SC_UTF8' because these legacy LOB types do not support UTF-8 or UTF-16 encodings. Use types varchar(max), nvarchar(max) or a collation which does not have the _SC or _UTF8 flags.

This reverts part of a2adb67.

CHANGELOG.md

@@ -2,6 +2,7 @@
 - PostgreSQL: Display auto_increment of inserted rows
 - PostgreSQL: Display description of system variables
 - PostgreSQL: Avoid warning about crdb_version (bug #924, regression from 5.0.5)
+- MS SQL: Fix collation issues when retrieving default values
 - CSS: Sticky table headers (bug #918)
 - CSS: Allow more custom styles with dark mode (bug #925)
 - IMAP: New plugin driver created for fun

adminer/drivers/mssql.inc.php

@@ -355,7 +355,7 @@ WHERE schema_id = SCHEMA_ID(" . q(get_schema()) . ") AND type IN ('S', 'U', 'V')
 		$return = array();
 		$table_id = get_val("SELECT object_id FROM sys.all_objects WHERE schema_id = SCHEMA_ID(" . q(get_schema()) . ") AND type IN ('S', 'U', 'V') AND name = " . q($table));
 		foreach (
-			get_rows("SELECT c.max_length, c.precision, c.scale, c.name, c.is_nullable, c.is_identity, c.collation_name, t.name type, CAST(d.definition as text) [default], d.name default_constraint, i.is_primary_key
+			get_rows("SELECT c.max_length, c.precision, c.scale, c.name, c.is_nullable, c.is_identity, c.collation_name, t.name type, d.definition [default], d.name default_constraint, i.is_primary_key
 FROM sys.all_columns c
 JOIN sys.types t ON c.user_type_id = t.user_type_id
 LEFT JOIN sys.default_constraints d ON c.default_object_id = d.object_id