Recurse ignored directories when stashing

src/stash.c

@@ -232,7 +232,8 @@ static int build_untracked_tree(
 	}
 
 	if (flags & GIT_STASH_INCLUDE_IGNORED) {
-		opts.flags |= GIT_DIFF_INCLUDE_IGNORED;
+		opts.flags |= GIT_DIFF_INCLUDE_IGNORED |
+			GIT_DIFF_RECURSE_IGNORED_DIRS;
 		data.include_ignored = true;
 	}
 
@@ -450,7 +451,8 @@ static int ensure_there_are_changes_to_stash(
 			GIT_STATUS_OPT_RECURSE_UNTRACKED_DIRS;
 
 	if (include_ignored_files)
-		opts.flags |= GIT_STATUS_OPT_INCLUDE_IGNORED;
+		opts.flags |= GIT_STATUS_OPT_INCLUDE_IGNORED |
+			GIT_STATUS_OPT_RECURSE_IGNORED_DIRS;
 
 	error = git_status_foreach_ext(repo, &opts, is_dirty_cb, NULL);