Fixed visibility declarations on dbforge and utility classes
diff --git a/system/database/drivers/oci8/oci8_forge.php b/system/database/drivers/oci8/oci8_forge.php
index f9a90ff..c59cfa7 100644
--- a/system/database/drivers/oci8/oci8_forge.php
+++ b/system/database/drivers/oci8/oci8_forge.php
@@ -55,7 +55,7 @@
 	 * @param	string	the database name
 	 * @return	bool
 	 */
-	protected function _drop_database($name)
+	public function _drop_database($name)
 	{
 		return FALSE;
 	}
@@ -144,7 +144,7 @@
 	 *
 	 * @return	bool
 	 */
-	protected function _drop_table($table)
+	public function _drop_table($table)
 	{
 		return FALSE;
 	}
@@ -166,7 +166,7 @@
 	 * @param	string	the field after which we should add the new field
 	 * @return	object
 	 */
-	protected function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '')
+	public function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '')
 	{
 		$sql = 'ALTER TABLE '.$this->db->protect_identifiers($table).' '.$alter_type.' '.$this->db->protect_identifiers($column_name);
 
@@ -212,7 +212,7 @@
 	 * @param	string	the new table name
 	 * @return	string
 	 */
-	protected function _rename_table($table_name, $new_table_name)
+	public function _rename_table($table_name, $new_table_name)
 	{
 		return 'ALTER TABLE '.$this->db->protect_identifiers($table_name).' RENAME TO '.$this->db->protect_identifiers($new_table_name);
 	}