Ticket #19045: 19045.diff

wp-admin/includes/update-core.php

@@ -337 +337 @@
         $required_mysql_version = '5.0';
         $wp_version = '3.3';
         $php_compat     = version_compare( $php_version, $required_php_version, '>=' );
-        if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $this->is_mysql ) )
+        if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) )
                 $mysql_compat = true;
         else
                 $mysql_compat = version_compare( $mysql_version, $required_mysql_version, '>=' );