Remove finfo_close call in MIME type detection (#1417)

* Remove finfo_close call in MIME type detection

Remove unnecessary finfo_close call after retrieving MIME type for PHP 8.5 compatibility

* Update tinyfilemanager.php

still be functional in earlier PHP versions.

Author: artt652

tinyfilemanager.php

@@ -2588,7 +2588,9 @@ function fm_get_mime_type($file_path)
     if (function_exists('finfo_open')) {
         $finfo = finfo_open(FILEINFO_MIME_TYPE);
         $mime = finfo_file($finfo, $file_path);
-        finfo_close($finfo);
+        if (\PHP_VERSION_ID < 80000) {
+            finfo_close($finfo);
+        }
         return $mime;
     } elseif (function_exists('mime_content_type')) {
         return mime_content_type($file_path);