[gtk/wip/carlosg/imwayland-for-master: 4/12] imwayland: Fix clearing of preedit text

[Carlos Garnacho <carlosg src gnome org>]

commit fcf28ded425181d7add5e3a35b0329f93bf660e1
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.

 gtk/gtkimcontextwayland.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/gtkimcontextwayland.c b/gtk/gtkimcontextwayland.c
index 2e5e81f2f3..13eea1b407 100644
--- a/gtk/gtkimcontextwayland.c
+++ b/gtk/gtkimcontextwayland.c
@@ -638,7 +638,7 @@ 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;