Replaced `==` with `===` and `!=` with `!==` in /system/database
diff --git a/system/database/drivers/mysql/mysql_forge.php b/system/database/drivers/mysql/mysql_forge.php
index 0e39aff..ffd374f 100644
--- a/system/database/drivers/mysql/mysql_forge.php
+++ b/system/database/drivers/mysql/mysql_forge.php
@@ -178,7 +178,7 @@
 		}
 
 		return $sql.$this->_process_fields($fields)
-			.($after_field != '' ? ' AFTER '.$this->db->protect_identifiers($after_field) : '');
+			.($after_field !== '' ? ' AFTER '.$this->db->protect_identifiers($after_field) : '');
 	}
 
 }