BUGFIX Ensure that values with unicode characters like macrons are saved

to the database correctly. Overload the prepStringForDB() method and
include an "N" prefix.

code/MSSQLDatabase.php

@@ -1568,6 +1568,17 @@ class MSSQLDatabase extends SS_Database {
 		}
 	}
 
+	/**
+	 * Overload the Database::prepStringForDB() method and include "N" prefix so unicode
+	 * strings are saved to the database correctly.
+	 *
+	 * @param string $string String to be encoded
+	 * @return string Processed string ready for DB
+	 */
+	public function prepStringForDB($string) {
+		return "N'" . Convert::raw2sql($string) . "'";
+	}
+
 	/**
 	 * Function to return an SQL datetime expression for MSSQL
 	 * used for querying a datetime in a certain format