seq: emulate the 'first monitor event' for anonymous PVs in safe mode

This is done by setting all event flags that have anonymous PVs sync'ed to
them, once right after all named (real) PVs have connected.

src/seq/seq_task.c

@@ -65,6 +65,15 @@ void sequencer (void *arg)	/* ptr to original (global) state program table */
 	if (seq_connect(sp, ((sp->options & OPT_CONN) != 0)) != pvStatOK)
 		goto exit;
 
+	/* Emulate the 'first monitor event' for anonymous PVs */
+	if ((sp->options & OPT_SAFE) != 0)
+	{
+		unsigned nch;
+		for (nch=0; nch<sp->numChans; nch++)
+			if (sp->chan[nch].syncedTo && !sp->chan[nch].dbch)
+				seq_efSet(sp->ss, sp->chan[nch].syncedTo);
+	}
+
 	/* Call program entry function if defined.
 	   Treat as if called from 1st state set. */
 	if (sp->entryFunc) sp->entryFunc(sp->ss, sp->ss->var);