Use portable format specifiers: Case %ld - localized - vim_snprintf_add.

Fix uses of localized "%ld" within vim_snprintf_add():
- Replace "%ld" with "%" PRId64.
- Cast corresponding argument to (int64_t).

src/buffer.c

@@ -2578,9 +2578,9 @@ fileinfo (
           (int64_t)curbuf->b_ml.ml_line_count, n);
   } else {
     vim_snprintf_add((char *)buffer, IOSIZE,
-        _("line %ld of %ld --%d%%-- col "),
-        (long)curwin->w_cursor.lnum,
-        (long)curbuf->b_ml.ml_line_count,
+        _("line %" PRId64 " of %" PRId64 " --%d%%-- col "),
+        (int64_t)curwin->w_cursor.lnum,
+        (int64_t)curbuf->b_ml.ml_line_count,
         n);
     validate_virtcol();
     len = STRLEN(buffer);

src/ex_cmds.c

@@ -4488,14 +4488,16 @@ do_sub_msg (
           "%s", count_only ? _("1 match") : _("1 substitution"));
     else
       vim_snprintf_add((char *)msg_buf, sizeof(msg_buf),
-          count_only ? _("%ld matches") : _("%ld substitutions"),
-          sub_nsubs);
+          count_only ?
+          _("%" PRId64 " matches") :
+          _("%" PRId64 " substitutions"),
+          (int64_t)sub_nsubs);
     if (sub_nlines == 1)
       vim_snprintf_add((char *)msg_buf, sizeof(msg_buf),
           "%s", _(" on 1 line"));
     else
       vim_snprintf_add((char *)msg_buf, sizeof(msg_buf),
-          _(" on %ld lines"), (long)sub_nlines);
+          _(" on %" PRId64 " lines"), (int64_t)sub_nlines);
     if (msg(msg_buf))
       /* save message to display it after redraw */
       set_keep_msg(msg_buf, 0);