[gtk] texture: Fix documentation block of gdk_texture_download

[Rico Tzschichholz <ricotz src gnome org>]

commit f7326ff828ad133a7884906ad4cd03e2d9980535
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Mon Mar 19 20:31:15 2018 +0100

    texture: Fix documentation block of gdk_texture_download

 gdk/gdktexture.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gdk/gdktexture.c b/gdk/gdktexture.c
index d9f8d6fd48..6aeed4152a 100644
--- a/gdk/gdktexture.c
+++ b/gdk/gdktexture.c
@@ -466,7 +466,7 @@ gdk_texture_download_area (GdkTexture         *texture,
   return GDK_TEXTURE_GET_CLASS (texture)->download (texture, area, data, stride);
 }
 
-/*
+/**
  * gdk_texture_download:
  * @texture: a #GdkTexture
  * @data: (array): pointer to enough memory to be filled with the
@@ -491,7 +491,7 @@ gdk_texture_download_area (GdkTexture         *texture,
  *                       cairo_image_surface_get_stride (surface));
  * cairo_surface_mark_dirty (surface);
  * ]|
- **/
+ */
 void
 gdk_texture_download (GdkTexture *texture,
                       guchar     *data,