Fixed style guide suggestion from philsturgeon on code review
diff --git a/system/libraries/Migration.php b/system/libraries/Migration.php
index 28b1dd6..840cefe 100644
--- a/system/libraries/Migration.php
+++ b/system/libraries/Migration.php
@@ -71,7 +71,7 @@
$this->load->dbforge();
// Make sure the migration table name was set.
- if ( (! isset($this->_migration_table)) OR (empty($this->_migration_table)))
+ if (empty($this->_migration_table))
{
show_error('Migrations configuration file (migration.php) must have "migration_table" set.');
}