[gtk+] gdkdnd: Fix signal docs

[Timm Bäder <baedert src gnome org>]

commit f0439264aa3648a2c556b61294580deb8d566d02
Author: Timm Bäder <mail baedert org>
Date:   Sun Jan 24 10:48:48 2016 +0100

    gdkdnd: Fix signal docs
    
    Signals all have at least one parameter, the object that received the
    signal.

 gdk/gdkdnd.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/gdk/gdkdnd.c b/gdk/gdkdnd.c
index b34b824..b27c0c6 100644
--- a/gdk/gdkdnd.c
+++ b/gdk/gdkdnd.c
@@ -272,6 +272,7 @@ gdk_drag_context_class_init (GdkDragContextClass *klass)
 
   /**
    * GdkDragContext::cancel:
+   * @context: The object on which the signal is emitted
    *
    * The drag and drop operation was cancelled.
    *
@@ -292,6 +293,7 @@ gdk_drag_context_class_init (GdkDragContextClass *klass)
 
   /**
    * GdkDragContext::drop-performed:
+   * @context: The object on which the signal is emitted
    * @time: the time at which the drop happened.
    *
    * The drag and drop operation was performed on an accepting client.
@@ -313,6 +315,7 @@ gdk_drag_context_class_init (GdkDragContextClass *klass)
 
   /**
    * GdkDragContext::dnd-finished:
+   * @context: The object on which the signal is emitted
    *
    * The drag and drop operation was finished, the drag destination
    * finished reading all data. The drag source can now free all
@@ -335,6 +338,7 @@ gdk_drag_context_class_init (GdkDragContextClass *klass)
 
   /**
    * GdkDragContext::action-changed:
+   * @context: The object on which the signal is emitted
    * @action: The action currently chosen
    *
    * A new action is being chosen for the drag and drop operation.