Use the correct command history

Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>

zathura.c

@@ -229,7 +229,7 @@ zathura_init(zathura_t* zathura)
   if (zathura->database == NULL) {
     girara_error("Unable to initialize database. Bookmarks won't be available.");
   } else {
-    g_object_set(zathura->ui.session->global.command_history, "io", zathura->database, NULL);
+    g_object_set(zathura->ui.session->command_history, "io", zathura->database, NULL);
   }
 
   /* bookmarks */