Call folder/get_contents for updated folders in device/get_changes

- it is not enough to rely on the parent information of updated files
   because that misses files and folders that were completely removed
   (even from trash)

fuse/main.c

@@ -219,7 +219,7 @@ int main(int argc, char *argv[])
 
     //folder_tree_housekeep(tree);
 
-    //folder_tree_debug(tree, NULL, 0);
+    folder_tree_debug(tree, NULL, 0);
 
     return fuse_main(args.argc, args.argv, &mediafirefs_oper, NULL);
 }