Qt: seekpoints: assume chapter name is utf8

(cherry picked from commit 1b23d5cc)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/gui/qt4/adapters/seekpoints.hpp

@@ -36,7 +36,7 @@ public:
     SeekPoint( seekpoint_t *seekpoint )
     {
         time = seekpoint->i_time_offset;
-        name = seekpoint->psz_name;
+        name = qfu( seekpoint->psz_name );
     };
     int64_t time;
     QString name;