[gtk] gtk: Fix some g-i annotations warnings

[Rico Tzschichholz <ricotz src gnome org>]

commit 158df3c1bb0b67f6b00f9270715277070f58cab5
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sun Mar 18 21:47:10 2018 +0100

    gtk: Fix some g-i annotations warnings

 gtk/gtkmediacontrols.c | 2 +-
 gtk/gtkmediafile.c     | 4 ++--
 gtk/gtkmediastream.c   | 2 +-
 gtk/gtkvideo.c         | 6 +++---
 4 files changed, 7 insertions(+), 7 deletions(-)
---
diff --git a/gtk/gtkmediacontrols.c b/gtk/gtkmediacontrols.c
index 1f299bd2f2..a55475e662 100644
--- a/gtk/gtkmediacontrols.c
+++ b/gtk/gtkmediacontrols.c
@@ -320,7 +320,7 @@ gtk_media_controls_new (GtkMediaStream *stream)
  *
  * Gets the media stream managed by @controls or %NULL if none.
  *
- * Returns: (nullable): The media stream managed by @controls
+ * Returns: (nullable) (transfer none): The media stream managed by @controls
  **/
 GtkMediaStream *
 gtk_media_controls_get_media_stream (GtkMediaControls *controls)
diff --git a/gtk/gtkmediafile.c b/gtk/gtkmediafile.c
index e3b0e62756..7c3f30f929 100644
--- a/gtk/gtkmediafile.c
+++ b/gtk/gtkmediafile.c
@@ -511,7 +511,7 @@ gtk_media_file_set_file (GtkMediaFile *self,
  * When @self is not playing or not playing from a file,
  * %NULL is returned.
  *
- * Returns: (nullable): The currently playing file or %NULL if not
+ * Returns: (nullable) (transfer none): The currently playing file or %NULL if not
  *     playing from a file.
  **/
 GFile *
@@ -571,7 +571,7 @@ gtk_media_file_set_input_stream (GtkMediaFile *self,
  * When @self is not playing or not playing from a stream,
  * %NULL is returned.
  *
- * Returns: (nullable): The currently playing stream or %NULL if not
+ * Returns: (nullable) (transfer none): The currently playing stream or %NULL if not
  *     playing from a stream.
  **/
 GInputStream *
diff --git a/gtk/gtkmediastream.c b/gtk/gtkmediastream.c
index 0688ed199c..6c03939ab6 100644
--- a/gtk/gtkmediastream.c
+++ b/gtk/gtkmediastream.c
@@ -1108,7 +1108,7 @@ gtk_media_stream_error (GtkMediaStream *self,
 }
 
 /**
- * gtk_media_stream_error:
+ * gtk_media_stream_error_valist:
  * @self: a #GtkMediaStream
  * @domain: error domain
  * @code: error code
diff --git a/gtk/gtkvideo.c b/gtk/gtkvideo.c
index 755acdde98..b6c1edd690 100644
--- a/gtk/gtkvideo.c
+++ b/gtk/gtkvideo.c
@@ -366,7 +366,7 @@ gtk_video_new_for_filename (const char *filename)
 
 /**
  * gtk_video_new_for_resource:
- * @filename: (allow-none): resource path to play back
+ * @resource_path: (allow-none): resource path to play back
  *
  * Creates a #GtkVideo to play back the resource at the
  * given @resource_path.
@@ -412,7 +412,7 @@ gtk_video_new_for_resource (const char *resource_path)
  *
  * Gets the media stream managed by @self or %NULL if none.
  *
- * Returns: (nullable): The media stream managed by @self
+ * Returns: (nullable) (transfer none): The media stream managed by @self
  **/
 GtkMediaStream *
 gtk_video_get_media_stream (GtkVideo *self)
@@ -582,7 +582,7 @@ gtk_video_set_file (GtkVideo *self,
 }
 
 /**
- * gtk_video_set_resource:
+ * gtk_video_set_filename:
  * @self: a #GtkVideo
  * @filename: (allow-none): the filename to play
  *