Improve DB field_data() for SQLite
diff --git a/system/database/drivers/sqlite/sqlite_result.php b/system/database/drivers/sqlite/sqlite_result.php
index 0e6335f..24f02a8b 100644
--- a/system/database/drivers/sqlite/sqlite_result.php
+++ b/system/database/drivers/sqlite/sqlite_result.php
@@ -98,10 +98,8 @@
 		{
 			$retval[$i]			= new stdClass();
 			$retval[$i]->name		= sqlite_field_name($this->result_id, $i);
-			$retval[$i]->type		= 'varchar';
-			$retval[$i]->max_length		= 0;
-			$retval[$i]->primary_key	= 0;
-			$retval[$i]->default		= '';
+			$retval[$i]->type		= NULL;
+			$retval[$i]->max_length		= NULL;
 		}
 
 		return $retval;