fix matches checks on BaseBuilder

Author: samsonasik

system/Database/BaseBuilder.php

@@ -3178,7 +3178,7 @@ protected function compileWhereHaving(string $qbKey): string
                     //	5 => ')'		/* optional */
                     // );
 
-                    if (! empty($matches[4])) {
+                    if (isset($matches[4]) && ($matches[4] !== '' && $matches[4] !== '0')) {
                         $protectIdentifiers = false;
                         if (str_contains($matches[4], '.')) {
                             $protectIdentifiers = true;