Reset input titles before adding new ones.

Fixes duplicate entries in title menu after INPUT_UPDATE_TITLE_LIST.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

src/input/var.c

@@ -285,6 +285,8 @@ void input_ControlVarNavigation( input_thread_t *p_input )
     if( !val.psz_string )
         return;
 
+    var_Change( p_input, "title", VLC_VAR_CLEARCHOICES, NULL, NULL );
+
     for( i = 0; i < p_input->p->i_title; i++ )
     {
         vlc_value_t val2, text2;