Suppress warnings when calling scandir().

Author: donquixote

src/ClassFilesIA/ClassFilesIA_NamespaceDirectoryPsr4.php

@@ -89,7 +89,7 @@ public function getIterator(): \Iterator {
    *   Format: $[$file] = $class
    */
   private static function scan(string $dir, string $terminatedNamespace): \Iterator {
-    $candidates = \scandir($dir, \SCANDIR_SORT_ASCENDING);
+    $candidates = @\scandir($dir, \SCANDIR_SORT_ASCENDING);
     if ($candidates === false) {
       throw new \RuntimeException("Failed to scandir('$dir').");
     }

src/NamespaceDirectory.php

@@ -667,7 +667,7 @@ private function scanThisDir(): array {
    *   would be redundant to do additional filtering here.
    */
   private static function scanKnownDir(string $dir): array {
-    $candidates = \scandir($dir, \SCANDIR_SORT_ASCENDING);
+    $candidates = @\scandir($dir, \SCANDIR_SORT_ASCENDING);
     if ($candidates === false) {
       throw new \RuntimeException("Failed to scandir('$dir').");
     }