[gtk/bilelmoussaoui/g-i] g-i: Add nullable annotations to EventControllerKey::im-context

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

commit 3b383569a436bded360c1b5943c762e150b8ba04
Author: Bilal Elmoussaoui <belmouss redhat com>
Date:   Fri Feb 11 12:59:55 2022 +0100

    g-i: Add nullable annotations to EventControllerKey::im-context
    
    Fixes https://github.com/gtk-rs/gtk4-rs/issues/874

 gtk/gtkeventcontrollerkey.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkeventcontrollerkey.c b/gtk/gtkeventcontrollerkey.c
index bf5f8f5dcb..49a149668b 100644
--- a/gtk/gtkeventcontrollerkey.c
+++ b/gtk/gtkeventcontrollerkey.c
@@ -293,7 +293,7 @@ gtk_event_controller_key_new (void)
 /**
  * gtk_event_controller_key_set_im_context:
  * @controller: a `GtkEventControllerKey`
- * @im_context: a `GtkIMContext`
+ * @im_context: (nullable): a `GtkIMContext`
  *
  * Sets the input method context of the key @controller.
  */
@@ -316,7 +316,7 @@ gtk_event_controller_key_set_im_context (GtkEventControllerKey *controller,
  *
  * Gets the input method context of the key @controller.
  *
- * Returns: (transfer none): the `GtkIMContext`
+ * Returns: (transfer none) (nullable): the `GtkIMContext`
  **/
 GtkIMContext *
 gtk_event_controller_key_get_im_context (GtkEventControllerKey *controller)