Move declaration of $map to DboSource

lib/Cake/Model/Datasource/Database/Mysql.php

@@ -141,13 +141,6 @@ class Mysql extends DboSource {
  */
 	protected $_charsets = array();
 
-/**
- * Map of the columns contained in a result.
- *
- * @var array
- */
-	public $map;
-
 /**
  * Connects to the database using options in the given configuration array.
  *

lib/Cake/Model/Datasource/Database/Postgres.php

@@ -104,13 +104,6 @@ class Postgres extends DboSource {
  */
 	protected $_sqlOps = array('like', 'ilike', 'or', 'not', 'in', 'between', '~', '~\*', '\!~', '\!~\*', 'similar to');
 
-/**
- * Map of the columns contained in a result.
- *
- * @var array
- */
-	public $map;
-
 /**
  * Connects to the database using options in the given configuration array.
  *

lib/Cake/Model/Datasource/Database/Sqlite.php

@@ -102,13 +102,6 @@ class Sqlite extends DboSource {
 		),
 	);
 
-/**
- * Map of the columns contained in a result.
- *
- * @var array
- */
-	public $map;
-
 /**
  * Connects to the database using config['database'] as a filename.
  *

lib/Cake/Model/Datasource/Database/Sqlserver.php

@@ -106,13 +106,6 @@ class Sqlserver extends DboSource {
 		'boolean' => array('name' => 'bit')
 	);
 
-/**
- * Map of the columns contained in a result.
- *
- * @var array
- */
-	public $map;
-
 /**
  * Magic column name used to provide pagination support for SQLServer 2008
  * which lacks proper limit/offset support.

lib/Cake/Model/Datasource/DboSource.php

@@ -247,6 +247,13 @@ class DboSource extends DataSource {
  */
 	protected $_methodCacheChange = false;
 
+/**
+ * Map of the columns contained in a result.
+ *
+ * @var array
+ */
+	public $map;
+
 /**
  * Constructor
  *