FS-4965 calling the variable playback_last_offset_pos instead

src/switch_ivr_play_say.c

@@ -1721,6 +1721,7 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_play_file(switch_core_session_t *sess
 		}
 
 		switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "done playing file %s\n", file);
+		switch_channel_set_variable_printf(channel, "playback_last_offset_pos", "%d", fh->offset_pos); 
 
 		if (read_impl.samples_per_second) {
 			switch_channel_set_variable_printf(channel, "playback_seconds", "%d", fh->samples_in / fh->native_rate);