[gnome-taquin] Fix compilation.

[Arnaud B. <arnaudb src gnome org>]

commit 4a35c6f5a056f3518e37b1fe0c0b4de5bf5aae52
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Mon Jan 7 15:25:07 2019 +0100

    Fix compilation.

 src/taquin-main.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/taquin-main.vala b/src/taquin-main.vala
index 243f364..9bf5f3b 100644
--- a/src/taquin-main.vala
+++ b/src/taquin-main.vala
@@ -206,7 +206,7 @@ public class Taquin : Gtk.Application
         {
             int random = Random.int_range (0, (int) dirlist.length());
             filename = dirlist.nth_data(random);
-            unowned List<string> entry = dirlist.find_custom (filename, strcmp);
+            unowned List<weak string> entry = dirlist.find_custom (filename, strcmp);
             dirlist.remove_link (entry);
         } while (filename[0] == '0' || (filename[0] != '1' && filename[0] != size.to_string ()[0] && 
dirlist.length () != 0));
         view.theme = Path.build_filename (DATA_DIRECTORY, "themes", settings.get_string ("theme"), filename);