MythMusic: Pass the full filename to TagExists() in Metadata::getTagg…

…er()

This fixes a bug when reading the metadata from flac files with ID3 tags.
(cherry picked from commit 459e806)

Signed-off-by: Stuart Morgan <smorgan@mythtv.org>

mythplugins/mythmusic/mythmusic/metadata.cpp

@@ -938,7 +938,7 @@ MetaIO* Metadata::getTagger(void)
         return &metaIOOggVorbis;
     else if (extension == "flac")
     {
-        if (metaIOID3.TagExists(Filename()))
+        if (metaIOID3.TagExists(Filename(true)))
             return &metaIOID3;
         else
             return &metaIOFLACVorbis;