dialog: rename dialog_provider

It'll will be replaced by the new dialog API

src/interface/dialog.c

@@ -49,10 +49,10 @@ int dialog_Register (vlc_object_t *obj)
     int ret = VLC_EGENERIC;
 
     vlc_mutex_lock (&provider_lock);
-    if (priv->p_dialog_provider == NULL)
+    if (priv->p_legacy_dialog_provider == NULL)
     {   /* Since the object is responsible for unregistering itself before
          * it terminates, at reference is not needed. */
-        priv->p_dialog_provider = obj;
+        priv->p_legacy_dialog_provider = obj;
         ret = VLC_SUCCESS;
     }
     vlc_mutex_unlock (&provider_lock);
@@ -72,9 +72,9 @@ int dialog_Unregister (vlc_object_t *obj)
     int ret = VLC_EGENERIC;
 
     vlc_mutex_lock (&provider_lock);
-    if (priv->p_dialog_provider == obj)
+    if (priv->p_legacy_dialog_provider == obj)
     {
-        priv->p_dialog_provider = NULL;
+        priv->p_legacy_dialog_provider = NULL;
         ret = VLC_SUCCESS;
     }
     vlc_mutex_unlock (&provider_lock);
@@ -87,7 +87,7 @@ static vlc_object_t *dialog_GetProvider (vlc_object_t *obj)
     vlc_object_t *provider;
 
     vlc_mutex_lock (&provider_lock);
-    if ((provider = priv->p_dialog_provider) != NULL)
+    if ((provider = priv->p_legacy_dialog_provider) != NULL)
         vlc_object_hold (provider);
     vlc_mutex_unlock (&provider_lock);
     return provider;

src/libvlc.c

@@ -100,7 +100,7 @@ libvlc_int_t * libvlc_InternalCreate( void )
 
     priv = libvlc_priv (p_libvlc);
     priv->playlist = NULL;
-    priv->p_dialog_provider = NULL;
+    priv->p_legacy_dialog_provider = NULL;
     priv->p_vlm = NULL;
 
     vlc_ExitInit( &priv->exit );

src/libvlc.h

@@ -148,7 +148,7 @@ typedef struct libvlc_priv_t
     /* Singleton objects */
     vlc_logger_t      *logger;
     vlm_t             *p_vlm;  ///< the VLM singleton (or NULL)
-    vlc_object_t      *p_dialog_provider; ///< dialog provider
+    vlc_object_t      *p_legacy_dialog_provider; ///< dialog provider
     struct playlist_t *playlist; ///< Playlist for interfaces
     struct playlist_preparser_t *parser; ///< Input item meta data handler
     struct vlc_actions *actions; ///< Hotkeys handler