[gnome-builder] completion: force signed integer math

[Christian Hergert <chergert src gnome org>]

commit ecef2cab190add569cd053452660d45c0eb8162f
Author: Christian Hergert <chergert redhat com>
Date:   Thu Jun 14 13:20:27 2018 -0700

    completion: force signed integer math

 src/libide/completion/ide-completion-list-box.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/libide/completion/ide-completion-list-box.c b/src/libide/completion/ide-completion-list-box.c
index 133b95748..aa2e379ec 100644
--- a/src/libide/completion/ide-completion-list-box.c
+++ b/src/libide/completion/ide-completion-list-box.c
@@ -863,7 +863,7 @@ ide_completion_list_box_move_cursor (IdeCompletionListBox *self,
   if (step == GTK_MOVEMENT_PAGES)
     direction *= self->n_rows;
 
-  if ((self->selected + direction) > n_items)
+  if (((gint)self->selected + direction) > n_items)
     self->selected = n_items - 1;
   else if (((gint)self->selected + direction) < 0)
     self->selected = 0;