Revert "Fixes bug #331"

This reverts commit 6d9876229c, because
it was found to break examples/xspice/various/xspice_c3.cir
(see discussion in bug report for February 2023) and an alternative
fix is available.

src/xspice/evt/evtbackup.c

@@ -577,7 +577,7 @@ static void EVTbackup_output_queue(
         output = *output_ptr;
 
         while(output) {
-            if (output->posted_time < new_time)
+            if(output->event_time > new_time)
                 break;
             output_ptr = &((*output_ptr)->next);
             output = *output_ptr;