[0.72] improve values checks in the cache to avoid duplicates (in case of multithreaded ocs import)

inc/rulesengine.class.php

@@ -2362,7 +2362,7 @@ class RuleCachedCollection extends RuleCollection{
 
 		if ($res_check = $DB->query($sql)){
 			$output_values=array();
-			if ($DB->numrows($res_check) == 1){
+			if ($DB->numrows($res_check) > 0){
 				$data=$DB->fetch_assoc($res_check);
 				foreach ($this->cache_params["output_value"] as $param => $param_value){
 					if (isset($data[$param_value])){