Bug fix: get filename with extension in some condition

lib/DirScanner.php

@@ -175,7 +175,7 @@ Class DirScanner {
 
     //获取文件名，不含文件后缀
     private function getFilenameWithoutExtension($realpath) {
-        return preg_replace('/\.[a-z]+$/i', '', $this->basename($realpath));
+        return preg_replace('/\.[^\.]+$/i', '', $this->basename($realpath));
     }
 
     //根据路径生成目录数组