Merge branch 'sp/maint-pack-memuse' into maint

* sp/maint-pack-memuse:
  Correct pack memory leak causing git gc to try to exceed ulimit

sha1_file.c

@@ -1609,6 +1609,7 @@ static void *unpack_delta_entry(struct packed_git *p,
 	off_t base_offset;
 
 	base_offset = get_delta_base(p, w_curs, &curpos, *type, obj_offset);
+	unuse_pack(w_curs);
 	base = cache_or_unpack_entry(p, base_offset, &base_size, type, 0);
 	if (!base)
 		die("failed to read delta base object"