Qt: MetaPanel: missing clear

(cherry picked from commit a49c94e306c0f05d5bdc74e6e6d24b69ef8d81fa)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/gui/qt4/components/info_panels.cpp

@@ -326,6 +326,7 @@ void MetaPanel::clear()
     language_text->clear();
     nowplaying_text->clear();
     publisher_text->clear();
+    encodedby_text->clear();
 
     setEditMode( false );
     emit uriSet( "" );