fixup??? clean: do not traverse mount points

This is required by `en/header-split-cache-h-part-3`.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

path.h

@@ -193,6 +193,7 @@ int normalize_path_copy_len(char *dst, const char *src, int *prefix_len);
 int normalize_path_copy(char *dst, const char *src);
 int longest_ancestor_length(const char *path, struct string_list *prefixes);
 char *strip_path_suffix(const char *path, const char *suffix);
+int is_mount_point_via_stat(struct strbuf *path);
 int daemon_avoid_alias(const char *path);
 
 /*