reset mCurrentLyricFilePath when lyric file is null or not exist

Author: asr-pub

lyricview/src/main/java/me/zhengken/lyricview/LyricView.java

@@ -288,6 +288,7 @@ public void setLyricFile(File file) {
 
         if (file == null || !file.exists()) {
             reset();
+            mCurrentLyricFilePath = "";
             return;
         } else if (file.getPath().equals(mCurrentLyricFilePath)) {
             return;