Merge branch 'ps/pathspec-empty-prefix-origin'

A recent update broke "git add -p ../foo" from a subdirectory.

* ps/pathspec-empty-prefix-origin:
pathspec: honor `PATHSPEC_PREFIX_ORIGIN` with empty prefix

diff --combined pathspec.c
index 69ef86b85a7735df428b8cab9f9cce477a4fcd89,3079a817a1a3dc5768e8d6a704a2bd3990b3cbcf..50f76fff458e45f57ae67c3474de8378f390f978
--- 1/pathspec.c
--- 2/pathspec.c
+++ b/pathspec.c
@@@ -505,7 -505,7 +505,7 @@@ static void init_pathspec_item(struct p
         * original. Useful for passing to another command.
         */
        if ((flags & PATHSPEC_PREFIX_ORIGIN) &&
-           prefixlen && !get_literal_global()) {
+           !get_literal_global()) {
                struct strbuf sb = STRBUF_INIT;
  
                /* Preserve the actual prefix length of each pattern */
@@@ -724,7 -724,7 +724,7 @@@ void clear_pathspec(struct pathspec *pa
                free(pathspec->items[i].match);
                free(pathspec->items[i].original);
  
 -              for (j = 0; j < pathspec->items[j].attr_match_nr; j++)
 +              for (j = 0; j < pathspec->items[i].attr_match_nr; j++)
                        free(pathspec->items[i].attr_match[j].value);
                free(pathspec->items[i].attr_match);