Find the playlist once *before* starting.

LibVLC always creates the (singleton) playlist before the interfaces anyway.
Besides, the HTTP interface callbacks assumes the playlist is yield.
This removes one of two reasons for running the damn HTTP interface thread.

modules/control/http/http.c

@@ -154,7 +154,8 @@ static int Open( vlc_object_t *p_this )
     {
         return( VLC_ENOMEM );
     }
-    p_sys->p_playlist = NULL;
+
+    p_sys->p_playlist = pl_Yield( p_this );
     p_sys->p_input    = NULL;
     p_sys->p_vlm      = NULL;
     p_sys->psz_address = psz_address;
@@ -172,6 +173,7 @@ static int Open( vlc_object_t *p_this )
     p_sys->psz_html_type = malloc( 20 + strlen( psz_src ) );
     if( p_sys->psz_html_type == NULL )
     {
+        pl_Release( p_this );
         free( p_sys->psz_address );
         free( p_sys );
         free( psz_src );
@@ -277,6 +279,7 @@ static int Open( vlc_object_t *p_this )
     if( p_sys->p_httpd_host == NULL )
     {
         msg_Err( p_intf, "cannot listen on %s:%d", psz_address, i_port );
+        pl_Release( p_this );
         free( p_sys->psz_html_type );
         free( p_sys->psz_address );
         free( p_sys );
@@ -386,6 +389,7 @@ failed:
     if( p_sys->iconv_to_utf8 != (vlc_iconv_t)-1 )
         vlc_iconv_close( p_sys->iconv_to_utf8 );
     free( p_sys );
+    pl_Release( p_this );
     return VLC_EGENERIC;
 }
 
@@ -446,6 +450,7 @@ static void Close ( vlc_object_t *p_this )
     if( p_sys->iconv_to_utf8 != (vlc_iconv_t)-1 )
         vlc_iconv_close( p_sys->iconv_to_utf8 );
     free( p_sys );
+    pl_Release( p_this );
 }
 
 /*****************************************************************************
@@ -457,12 +462,6 @@ static void Run( intf_thread_t *p_intf )
 
     while( !intf_ShouldDie( p_intf ) )
     {
-        /* get the playlist */
-        if( p_sys->p_playlist == NULL )
-        {
-            p_sys->p_playlist = vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
-        }
-
         /* Manage the input part */
         if( p_sys->p_input == NULL )
         {
@@ -486,12 +485,6 @@ static void Run( intf_thread_t *p_intf )
         vlc_object_release( p_sys->p_input );
         p_sys->p_input = NULL;
     }
-
-    if( p_sys->p_playlist )
-    {
-        vlc_object_release( p_sys->p_playlist );
-        p_sys->p_playlist = NULL;
-    }
 }
 
 /****************************************************************************