🎨 clarify \Config::UpdateIncludes with $sModulesDir=null

core/config.class.inc.php

@@ -2056,7 +2056,7 @@ class Config
 	 * selected modules
 	 *
 	 * @param string $sModulesDir The relative path to the directory to scan for modules (typically the 'env-xxx'
-	 *     directory resulting from the compilation)
+	 *     directory resulting from the compilation). If null nothing will be done.
 	 * @param array $aSelectedModules An array of selected modules' identifiers. If null all modules found will be
 	 *     considered as installed
 	 *
@@ -2064,8 +2064,11 @@ class Config
 	 */
 	public function UpdateIncludes($sModulesDir, $aSelectedModules = null)
 	{
-		if (!is_null($sModulesDir))
+		if ($sModulesDir === null)
 		{
+			return;
+		}
+
 		// Initialize the arrays below with default values for the application...
 		$oEmptyConfig = new Config('dummy_file', false); // Do NOT load any config file, just set the default values
 		$aAddOns = $oEmptyConfig->GetAddOns();
@@ -2109,7 +2112,6 @@ class Config
 		}
 		$this->SetAddOns($aAddOns);
 	}
-	}
 
     /**
      * Helper: for an array of string, change the prefix when found