avutil/opt: Fix type specifier

This bug has been introduced in 9e0a071e.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavutil/opt.c

@@ -1200,7 +1200,7 @@ static void opt_list(void *obj, void *av_log_obj, const char *unit,
                 break;
             case AV_OPT_TYPE_CONST:
                 if (parent_type == AV_OPT_TYPE_INT)
-                    av_log(av_log_obj, AV_LOG_INFO, "%-12d ", opt->default_val.i64);
+                    av_log(av_log_obj, AV_LOG_INFO, "%-12"PRId64" ", opt->default_val.i64);
                 else
                     av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "");
                 break;