[gnome-builder] ctags: fix warning from previous commit

[Christian Hergert <chergert src gnome org>]

commit 181e5fdb62dda85f04a705fe7e538a2916017153
Author: Christian Hergert <christian hergert me>
Date:   Sun Feb 21 15:12:21 2016 -0800

    ctags: fix warning from previous commit

 plugins/ctags/ide-ctags-completion-provider.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/plugins/ctags/ide-ctags-completion-provider.c b/plugins/ctags/ide-ctags-completion-provider.c
index 98230c0..6dbbad6 100644
--- a/plugins/ctags/ide-ctags-completion-provider.c
+++ b/plugins/ctags/ide-ctags-completion-provider.c
@@ -240,7 +240,7 @@ ide_ctags_completion_provider_populate (GtkSourceCompletionProvider *provider,
           if (g_hash_table_contains (completions, entry->name))
             continue;
 
-          g_hash_table_add (completions, entry->name);
+          g_hash_table_add (completions, (gchar *)entry->name);
 
           if (!ide_ctags_is_allowed (entry, allowed))
             continue;