[gtksourceview] completion: clear previous cell data on display

[Christian Hergert <chergert src gnome org>]

commit 508ce7ed41ecfb285127c6c563731d64bbeccade
Author: Christian Hergert <chergert redhat com>
Date:   Sat Sep 3 11:29:13 2022 -0700

    completion: clear previous cell data on display

 .../completion-providers/snippets/gtksourcecompletionsnippets.c       | 4 ++++
 gtksourceview/completion-providers/words/gtksourcecompletionwords.c   | 4 ++++
 2 files changed, 8 insertions(+)
---
diff --git a/gtksourceview/completion-providers/snippets/gtksourcecompletionsnippets.c 
b/gtksourceview/completion-providers/snippets/gtksourcecompletionsnippets.c
index ed5f400e..f11db5fa 100644
--- a/gtksourceview/completion-providers/snippets/gtksourcecompletionsnippets.c
+++ b/gtksourceview/completion-providers/snippets/gtksourcecompletionsnippets.c
@@ -346,6 +346,10 @@ gtk_source_completion_snippets_display (GtkSourceCompletionProvider *provider,
        {
                gtk_source_completion_cell_set_text (cell, p->info.description);
        }
+       else
+       {
+               gtk_source_completion_cell_set_text (cell, NULL);
+       }
 }
 
 static void
diff --git a/gtksourceview/completion-providers/words/gtksourcecompletionwords.c 
b/gtksourceview/completion-providers/words/gtksourcecompletionwords.c
index bc088ebf..51d9c6f8 100644
--- a/gtksourceview/completion-providers/words/gtksourcecompletionwords.c
+++ b/gtksourceview/completion-providers/words/gtksourcecompletionwords.c
@@ -374,6 +374,10 @@ gtk_source_completion_words_display (GtkSourceCompletionProvider *provider,
        {
                gtk_source_completion_cell_set_icon_name (cell, "completion-word-symbolic");
        }
+       else
+       {
+               gtk_source_completion_cell_set_text (cell, NULL);
+       }
 }
 
 static void