fixed some more E_STRICT issues

lib/Doctrine/Export/Mssql.php

@@ -150,7 +150,7 @@ class Doctrine_Export_Mssql extends Doctrine_Export
      *                             actually perform them otherwise.
      * @return void
      */
-    public function alterTable($name, $changes, $check)
+    public function alterTable($name, array $changes, $check)
     {
         foreach ($changes as $changeName => $change) {
             switch ($changeName) {

lib/Doctrine/Expression/Oracle.php

@@ -41,12 +41,11 @@ class Doctrine_Expression_Oracle extends Doctrine_Expression
      * @param string $arg1, $arg2 ... $argN     strings that will be concatinated.
      * @return string
      */
-    public function concat($arg1, $arg2)
+    public function concat()
     {
         $args = func_get_args();
 
-        $cols = $this->getIdentifiers( $args );
-        return join( ' || ' , $cols );
+        return join(' || ' , $args);
     }
     /**
      * return string to call a function to get a substring inside an SQL statement

lib/Doctrine/Expression/Pgsql.php

@@ -92,12 +92,11 @@ class Doctrine_Expression_Pgsql extends Doctrine_Expression
      * @param string|array(string) strings that will be concatinated.
      * @return string
      */
-    public function concat($arg1, $arg2)
+    public function concat()
     {
         $args = func_get_args();
-        $cols = $this->getIdentifiers($cols);
 
-        return join(' || ' , $cols);
+        return join(' || ' , $args);
     }
     /**
      * Returns the SQL string to return the current system date and time.

lib/Doctrine/Import/Mssql.php

@@ -115,7 +115,7 @@ class Doctrine_Import_Mssql extends Doctrine_Import
      *
      * @return array
      */
-    public function listTriggers()
+    public function listTriggers($database = null)
     {
         $query = "SELECT name FROM sysobjects WHERE xtype = 'TR'";