Check if passed id is number or numeric string

Previous check was converting numeric string to int if it was starting with number

Classes/Plugin/Eid/SearchInDocument.php

@@ -107,6 +107,6 @@ private function getQuery($fields, $parameters) {
     }
 
     private function getUid($uid) {
-        return intval($uid) > 0  ? intval($uid) : $uid;
+        return is_numeric($uid) > 0  ? intval($uid) : $uid;
     }
 }