[gtk/gtk-3-24: 1/3] imwayland: Fix clearing of preedit text

[Matthias Clasen <matthiasc src gnome org>]

commit c22d5ab9f6ae0782c2a472feb58f3b3acd5a03bc
Author: Dorota Czaplejewicz <dorota czaplejewicz puri sm>
Date:   Mon Sep 10 08:32:23 2018 +0000

    imwayland: Fix clearing of preedit text
    
    Fixes terminal emulator misbehaviour as outlined in https://gitlab.gnome.org/GNOME/gtk/issues/1316, which 
was introduced in 49b17e6c. The original commit cleared preedit text by setting it to an empty string, which 
still counted as existing preedit. The fix sets preedit string to null, which is correctly understood as not 
present.

 modules/input/imwayland.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/modules/input/imwayland.c b/modules/input/imwayland.c
index 11d09d2007..1fe95f38a1 100644
--- a/modules/input/imwayland.c
+++ b/modules/input/imwayland.c
@@ -654,7 +654,7 @@ gtk_im_context_wayland_focus_out (GtkIMContext *context)
   commit_state (context_wayland);
 
   /* after disable, incoming state changes won't take effect anyway */
-  text_input_preedit (global, global->text_input, "", 0, 0);
+  text_input_preedit (global, global->text_input, NULL, 0, 0);
   text_input_preedit_apply (global);
 
   global->current = NULL;