[HttpKernel] Fix PHP deprecation

Author: nicolas-grekas

src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php

@@ -224,7 +224,7 @@ private function getContainerDeprecationLogs(): array
 
     private function getContainerCompilerLogs(string $compilerLogsFilepath = null): array
     {
-        if (!is_file($compilerLogsFilepath)) {
+        if (!$compilerLogsFilepath || !is_file($compilerLogsFilepath)) {
             return [];
         }