[ticket/17232] Improve SQL error messages handling

PHP 7 changes how most errors are reported by PHP. Instead of reporting errors
through the traditional error reporting mechanism used by PHP 5, most errors
are now reported by throwing Error exceptions.
Use it to display meaningful SQL error messages instead of PHP fatal errors
for SQL errors.

PHPBB3-17232

phpBB/phpbb/db/tools/factory.php

@@ -33,6 +33,10 @@ class factory
 		{
 			return new \phpbb\db\tools\postgres($db_driver, $return_statements);
 		}
+		else if ($db_driver instanceof \phpbb\db\driver\sqlite3)
+		{
+			return new \phpbb\db\tools\sqlite3($db_driver, $return_statements);
+		}
 		else if ($db_driver instanceof \phpbb\db\driver\driver_interface)
 		{
 			return new \phpbb\db\tools\tools($db_driver, $return_statements);