show_patch_diff(): remove a call to fstat()

Currently inside show_patch_diff() we have an fstat() call after an
ok lstat() call.  Since before the call to fstat() we have already
tested for the link case with S_ISLNK(), the fstat() can be removed.

Signed-off-by: Kjetil Barvik <barvik@broadpark.no>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

combine-diff.c

@@ -713,9 +713,7 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
 			result_size = buf.len;
 			result = strbuf_detach(&buf, NULL);
 			elem->mode = canon_mode(st.st_mode);
-		}
+		} else if (0 <= (fd = open(elem->path, O_RDONLY))) {
-		else if (0 <= (fd = open(elem->path, O_RDONLY)) &&
-			 !fstat(fd, &st)) {
 			size_t len = xsize_t(st.st_size);
 			ssize_t done;
 			int is_file, i;