Add comment to my previous lread.c change.

diff --git a/src/lread.c b/src/lread.c
index 2042d16592928f5d2058dbd2d3ab5f1ef3134d9c..6404b56fc11cd99630b28c7814e1bc017c5cb619 100644 (file)
--- a/src/lread.c
+++ b/src/lread.c
@@ -1467,9 +1467,12 @@ openp (Lisp_Object path, Lisp_Object str, Lisp_Object suffixes,
   Lisp_Object string, tail, encoded_fn, save_string;
   ptrdiff_t max_suffix_len = 0;
   int last_errno = ENOENT;
-  struct timespec save_mtime = make_timespec (TYPE_MINIMUM (time_t), -1);
   int save_fd = -1;
 
+  /* The last-modified time of the newest matching file found.
+     Initialize it to something less than all valid timestamps.  */
+  struct timespec save_mtime = make_timespec (TYPE_MINIMUM (time_t), -1);
+
   CHECK_STRING (str);
 
   for (tail = suffixes; CONSP (tail); tail = XCDR (tail))